|Died||c. 883 or 884 (age approx. 68)|
Baghdad, Abbasid Caliphate
|Era||Islamic Golden Age |
|Part of a series on|
Dawud bin Ali bin Khalaf al-Zahiri (Arabic: داود بن علي بن خلف الظاهري) (c. 815–883/4 CE, 199-269/270 AH) was a Muslim scholar of Islamic law during the Islamic Golden Age, specializing in the fields of hermeneutics, biographical evaluation, and historiography. He is widely regarded as the founder of the Ẓāhirī school of thought (madhab), the fifth school of thought in Sunni Islam, characterised by its reliance on the manifest (zahir) meaning of expressions in the Qur'an and hadith.
Al-Zahiri's exact place of birth is not entirely clear to historians. It is disputed if he was from Kufa or Isfahan. Al-Zahiri's father was Arab whereas his mother was most likely Persian. Some attribute his origin to the Iranian city of Isfahan, and he has been referred to as "Dawud al-Isfahani." Ibn Hazm, Al-Dhahabi, Christopher Melchert and others, however, held that this attribution was due to the fact that al-Zahiri's mother was a native of Isfahan, and that he was actually of Iraqi origins, having been born in the city of Kufa. Ignác Goldziher agreed that al-Zahiri was born in Kufa, but attributed the confusion regarding his place of birth due to his father's role in the civil service of the Abbasid Caliph Al-Ma'mun in Kashan, a smaller city near Isfahan.
During his formative years, al-Zahiri relocated from Kufa to Baghdad and studied prophetic tradition and Qur'anic exegesis with a number of notable scholars during the time, including Abu Thawr, Yahya ibn Ma'in, and Ahmad ibn Hanbal. His study under renowned figures of traditionalist theology was in contrast to the views of his father, who was a follower of the less orthodox Hanafi school. Indian reformist Chiragh Ali has suggested that Zahiri's school was, like Ibn Hanbal's, actually a direct reaction to the Hanafi system.
Toward the end of his education, al-Zahiri traveled to Nishapur in Greater Khorasan in order to complete his studies with Ishaq Ibn Rahwayh, at the time considered a champion of the traditionalist Sunni philosophy. Ibn al-Jawzi noted that when studying with Ibn Rahwayh, considered one of the most knowledgeable scholars in Muslim history, al-Zahiri was willing to debate with Ibn Rahwayh on religious topics, something no one else had ever dared to do. Rahwayh criticized Al-Shafi‘i during a lesson; a debate ensued in which Zahiri alleged that Rahwayh didn't understand al-Shafi'i's point on the topic of discussion, though Ibn Hanbal, who was physically present for the debate, declared Rahwayh to be the winner.
Al-Zahiri was initially a follower of Al-Shafi‘i in jurisprudence, later branching off in terms of his principles, likely due to the influence of Ibn Rahwayh. Describing him as "fanatical" both in his adherence to Shafi'i and to his own school later on, the Encyclopedia of Islam describes al-Zahiri's school as a one-sided elaboration of Shafi'i's, taking the latter's rejection of juristic discretion as a principle in formulating law and applying it to all forms of human reasoning.
After completing his studies in Nishapur, al-Zahiri returned to Baghdad and began delivering his own lessons. While historians differ regarding his exact number of students, it is agreed that his following was large, with most estimates ranging between four and five hundred students who would regularly attend his Majlis. His reputation spread outside of Baghdad, and even high-level scholars from elsewhere in the Muslim world began seeking al-Zahiri's advice on religious topics of study. While his views were not universally accepted in his time, no attempts were made by his contemporaries to prevent him from granting religious verdicts, nor were they opposed to his teaching position. His most well-known students were his son Muhammad bin Dawud al-Zahiri, Abdullah, the son of Ibn Hanbal, Muhammad ibn Jarir al-Tabari, Niftawayh and Ruwaym. Zahiri was also the teacher of early jurist Abd Allah al-Qaysi, who was responsible for spreading the Zahirite school in Al-Andalus.
Al-Zahiri died during the month of Ramadan in Baghdad, where he was buried. The exact year in which he died according to the Gregorian calendar is a matter of some dispute, with historians having stated both 883 CE and 884 CE.
Ad-Dhahabi states that al-Zahiri learnt Kalam from Ibn Kullab. Similar to others who shared Ibn Kullab's creed, such as Harith al-Muhasibi and al-Bukhari, al-Zahiri was repudiated by the other hadith authorities of his time for his particular creedal views relating to God's speech.
Al-Zahiri was described by Ad-Dhahabi's teacher, Ibn Taymiyyah, as having been upon Athari creed, affirming the attributes of God without delving into their fundamental nature. Al-Shahrastani, a 12th-century historian of religions and Ash'ari theologian, grouped al-Zahiri along with Malik bin Anas, Ibn Hanbal and Sufyan al-Thawri as early Sunni figures who rejected both esoteric and anthropotheistic interpretations of God, but both Ibn Taymiyyah and al-Shahrastani considered al-Zahiri and his students, along with Malik, Ibn Hanbal, al-Thawri, Abu Thawr, Al-Mawardi and al-Shafi'i and their students to be the people of the hadith,[verification needed] as opposed to the people of ra'y.
This creed of not delving into the fundamental nature of the texts likely affected al-Zahiri's views on literalism as well. While all the major figures of Islam were united upon the Qur'an and Sunnah being the foremost sources of law, al-Zahiri held that these two sources must also be taken at the literal meanings and only applied in the particular circumstances which they described.
Al-Zahiri rejected Qiyas, otherwise known as analogical reasoning, as a method of deducing rulings in jurisprudence, regarding it as a form of bid‘ah, or addition to Islam which Muhammad had not allowed. There are conflicting views regarding al-Zahiri's position when the specific causality of a command or prohibition within the Qur'an or prophetic example was stated, due to different historians recording opposing statements. Some take the view that al-Zahiri restricted the ruling to the incident or condition in which the causality arose, seeing that the causality provides a concrete law; others take the view that he would instead form a general principle in the event of a stated causality.
Nature of the Qur'an
While al-Zahiri at one time studied Hadith studies under Ibn Hanbal, he was later barred from study due to a dispute regarding the nature of the Qur'an; al-Zahiri stated that the Qur'an was "muhdath," or recently occurring, a stance of which Ibn Hanbal strongly disapproved. Even before that time, Ibn Hanbal had actually cut off contact with anyone who would study with or consult Zahiri regarding religious matters, a habit Ibn Hanbal started after witnessing Zahiri's defense of al-Shafi'i against Rahwayh. The rumor regarding Zahiri's statement about the Qur'an only added more fuel to the fire. Syrian historian Ibn Taymiyyah said that the dispute was semantic in nature, arising from a confusion of al-Zahiri's intended meaning – that God is existent without peers – and the intended meaning of the Jahmites and Mu'tazila – that the Qur'an was created.
Thus al-Zahiri, Ibn Hanbal, al-Shafi'i, Ibn Rahwayh, al-Tabari, Malik ibn Anas, Sufyan al-Thawri, Abd al-Rahman al-Awza'i, Abū Ḥanīfa, Ibn Khuzaymah, Abdullah ibn Mubarak, Al-Darimi and Muhammad al-Bukhari – described by Ibn Taymiyyah as the leading figures of Islam at the time – all agreed that the Qur'an was uncreated, but a semantic misunderstanding arose when al-Zahiri, al-Bukhari, Muslim bin al-Hajjaj and others used the phrase "recently occurring" to establish that God and the Qur'an, believed by Muslims to be the literal speech of God, are not the same thing, but rather than God's speech is an attribute.
Modern-day scholarship has suggested, in light of the weakness in the chains of narration connecting the phrase "the Qur'an is recently occurring" to al-Zahiri that al-Zahiri may have never made such a statement or held such a belief at all. Due to al-Zahiri's denial of analogical reasoning and blind following – cornerstones in the other main Sunni schools of thought – the students of those schools may have forged the statement and attributed it to al-Zahiri as a means of pushing the common people away from him and his school of thought. Abu Ubaida further supported his point by noting that al-Zahiri and his students were actually severer in their opposition to the Mu'tazila and their belief that the Qur'an was created than Ibn Hanbal was, using harsh language in their written responses to such beliefs.
al-Zahiri held the view than in in-kind exchanges of goods, the forbidden type of usury applies to only six commodities specified by Muhammad: gold, silver, wheat, barley, dates and salt. Because al-Zahiri rejected the use of analogical reasoning in jurisprudence, he disagreed with the majority view that the prohibition on excess gain in in-kind exchanges of all commodities, and did not consider such gains to be a form of interest. Had Muhammad intended to include commodities other than the above six, he could have done so; because he specified that usury was only prohibited in these six commodities and that Muslims were free to deal in other commodities as they liked, al-Zahiri saw no basis for making an analogy to any other commodities.
According to al-Shawkani, al-Zahiri regarded the Muslim face veil to be recommended rather than obligatory, seeing that a woman's face could be uncovered in public but that all other body parts must be covered. This was the position of Ibn Hanbal as well.
If a Muslim begins traveling while fasting during the month of Ramadan, al-Zahiri saw that the individual should break their fast on the day which they started their journey, a view which Ibn Hanbal and Ibn Rahwayh agreed. This was due to the Qur'anic verse allowing the traveler to skip the Ramadan fast and make it up when they complete their journey. If a Muslim did fast while traveling, they would still have to make up the days the skipped according to al-Zahiri's view, as the verse wasn't merely an allowance for breaking the fast, but a command.
Most Muslims shorten the length of their prayers while traveling as well. This "traveling" by which the Muslim shortens his prayers and breaks the fast is a topic of discussion among jurists as to its distance and duration. al-Zahiri saw that any form of traveling, regardless of distance or duration, allowed the individual to shorten their prayers.
Al-Zahiri was known as being a prolific author, and Persian historian Ibn al-Nadim was able to personally record the names of at least 157 of al-Zahiri's written works, the majority on topics within Islamic studies. Some of these works were very long, and they covered both legal theory and all branches of positive law. He was also considered to be the first person to have written a biography of his former teacher, al-Shafi'i. Melchert cites Ibn al-Nadim and Ibn 'Abd al-Barr for his claim that Zahiri's biography of Shafi'i was the not just the first biography about Shafi'i but the first major biography of any Muslim jurist ever written. None of these works have survived to the modern era in their entirety.
Ibn al-Nadim also mentions that after al-Shafi'i's al-Risala, Ibn Hanbal and al-Zahiri were the next major Sunni figures to author works on the principles of Islamic jurisprudence, with al-Zahiri producing a number of works on topics including his rejection of blindly following clergymen, the difference between general and specific verses of the Qur'an, the difference between succinct and detailed commands in the religion, and his views on and experiences with his former teacher, al-Shafi'i. Modern scholarship has pieced together chapter headings for al-Zahiri's work on juristic principles from other early works in the following order: binding consensus, invalidity of blindly following clergy, invalidity of analogical reason, traditions transmitted by single authorities, traditions which provide certainty, incontrovertible proof, particular vs. general scriptural texts and specified vs. unspecified texts. The chapters – and perhaps even the information contained therein – have primarily been preserved by the work of Fatimid writer Qadi al-Nu'man, in addition to passages in Al-Muhalla of Sunni jurist Ibn Hazm, an adherent of al-Zahiri's legal school.
Although al-Zahiri's religious views were and are considered controversial, his character and religious piety carry universal acclaim. Al-Khatib al-Baghdadi, Al-Suyuti, Muhammad Nasiruddin al-Albani, al-Dhahabi, Al-Nawawi and al-Tabari all attested to his morality, humility and personal ethics.
While al-Zahiri's school is not as numerous today as the other four major schools of Sunni thought, the Zahiri, or "Dawudi" school as they were known in Islam's early stages, was once a major school and encompassed Mesopotamia, the Iberian Peninsula, the Balearic Islands, North Africa and Southern Iran. Even his contemporary critics conceded to his intellect and level of knowledge, even while rejecting his beliefs. He has been described as "the scholar of the era" by al-Dhahabi, and the hierarchy of religious knowledge in Baghdad was considered to have ended with al-Zahiri at the top. When al-Tabari was asked regarding the books of Ibn Qutaybah, he answered that Ibn Qutaybah's work was "nothing," and recommended the books of the "people of jurisprudence," mentioning al-Shafi'i and al-Zahiri by name, then "their contemporaries."
Members of other schools have often criticized al-Zahiri for his rejection of analogical reasoning. The early followers of al-Shafi'i in general held negative views of their former classmate, and from the followers of the Shafi'ite school Al-Juwayni in particular was harsh upon al-Zahiri himself. This is not universal, and many followers of the Shafi'i school have taken more accommodating views of al-Zahiri's legal rulings. al-Dhahabi defended al-Zahiri and his followers, stating that just as al-Juwayni had arrived to his views by the process of scholarly discourse, so had al-Zahiri. Likewise, Ibn al-Salah also defended the legitimacy of al-Zahiris views and his school, listing a number of figures from the other Sunni schools of thought who considered al-Zahiri's opinions in scholarly discourse.
Shi'ites have taken a dimmer view of al-Zahiri and his school. In the 1970s, Twelver Shi'ite scholar Abdul Kareem Mushtaq accused al-Zahiri of having held anthropotheistic beliefs regarding God, citing Sunni historian al-Shahrastani as his source. Nearly four decades later, the section of al-Shahrastani's work was translated into English, demonstrating that al-Shahrastani had actually stated that al-Zahiri didn't hold anthropotheistic beliefs. al-Shahrastani had stated:
- "As for Aĥmad ibn Ĥanbal, Dāwūd ibn `Alī al-Işfahānī and a group of Imāms from the predecessors, they took the methodological course of the early predecessors from the people of narrations—such as Mālik ibn Anas and Muqātil ibn Sulaymān—and followed the safe path.
- They said: ‘We believe in whatever is mentioned in the Book and the Sunna, and we do not come to grips with the interpretation; after we certainly know that Allāh, the Powerful and Exalted, does not resemble anything from the creation and that all what is portrayed in imagination is created and foreordained.’
- And they used to guard themselves from anthropomorphism to such a degree, that they said: ‘Whosoever moved his hand during the recitation of His statement: ‘…I created with My hands?’ or pointed with his two fingers during his narration: ‘The heart of the believer is between two fingers of the Merciful,’ his hand should be cut and his two fingers removed."
Ismaili Shi'ites have, perhaps, been more accurate in that for which they criticized al-Zahiri. al-Nu'man was particularly critical of al-Zahiri for rejecting analogical reason yet at the same time accepting inference as a valid means of logical deduction, a position for which he also criticized al-Zahiri's son and school in general.
Being steeped in esoteric philosophy, the Mu'tazila were quite hostile towards al-Zahiri and his school. Although some prominent Mu'tazilite figures such as al-Nazzam denied the validity of analogical reasoning as al-Zahiri did, they also denied literalism and the validity of consensus, and most of them found al-Zahiri's ideas to be ridiculous.
- Lobel, Diana (2000). Between Mysticism and Philosophy. State University Plaza, Albany, NY 12246: State University of New York Press. p. 60. ISBN 0-7914-4451-1.
..Muslim traditionalists as Dawud al-Zahiri, Ibn Qutayba and Ibn Hazm.CS1 maint: location (link)
- Bearman, Bianquis, Bosworth, van Donzel, Heinrichs, P. , Th. , C.E. , E. , W.P., ed. (2005). "Dāwūd b. ʿAlī b. K̲h̲alaf". Encyclopaedia of Islam, Second Edition Vol.2. State University Plaza, Albany, NY 12246: Brill. p. 182. ISBN 9789004161214.
An extreme representative of the tendency hostile to human reasoning and relying exlusively on Ḳurʾān and ḥadīt̲h̲, Dāwūd not only rejected personal opinion ( raʾy ) as al-S̲h̲āfiʿī... a traditionalist whose doctrine represents a one-sided elaboration and development of that of al-Shāfiʿī and his school.CS1 maint: multiple names: editors list (link) CS1 maint: location (link)
- Crowe, Youngwon Lee, Jonathan, Constance (2019). "9: Natural law in Islam from theological and legal perspectives". Research Handbook on Natural Law Theory. The Lypiatts,15 Lansdown Road, Cheltenham, Glos GL50 2JA, UK: Edward Elgar Publishing. p. 157. ISBN 978-1-78811-003-7.
..the traditionalists gained further ascendancy through Ahmad bin Hanbal and Dawud bin Khalaf al-Zahiri.CS1 maint: location (link)
- Taareekh at-Tashree’ al-Islaamee, pp. 181, 182
- Joseph Schacht, Dāwūd b. ʿAlī b. Khalaf. Encyclopaedia of Islam, Second Edition. Brill Online, 2013. Reference. 9 January 2013
- Mohammad Sharif Khan and Mohammad Anwar Saleem, Muslim Philosophy And Philosophers, pg. 34. New Delhi: Ashish Publishing House, 1994.
- Dr. Mohammad Omar Farooq, The Riba-Interest Equivalence Archived 12 March 2012 at the Wayback Machine, June 2006
- Al-Dhahabi, Siyar a`lam al-nubala'., v.13, Entry 55, pg.97–108
- Frye, R. N.; Fisher, William Bayne; Frye, Richard Nelson; Avery, Peter; Gershevitch, Ilya; Boyle, John Andrew; Yarshater, Ehsan; Jackson, Peter (26 June 1975). The Cambridge History of Iran. ISBN 9780521200936.
- Chiragh Ali, The Proposed Political, Legal and Social Reforms. Taken from Modernist Islam 1840–1940: A Sourcebook, pg. 281. Edited by Charles Kurzman. New York City: Oxford University Press, 2002.
- Encyclopedia of Islam, vol. II, C-G, pg. 182. Eds. Bernard Lewis, Charles Pellat and Joseph Schacht. Assist. J. Burton-Page, C. Dumont and V.L. Menage. Leiden: Brill Publishers, 1971. Photomechanical print.
- Abdul-Qadir bin Abi al-Wafa al-Qurashi, Tabaqat al-Hanafiya, v.1, pg.419
- Devin J. Stewart, "Muhammad b. Dawud al-Zahiri's Manual of Jurisprudence." Taken from Studies in Islamic Law and Society Volume 15: Studies in Islamic Legal Theory. Edited by Bernard G. Weiss. Pg. 114. Leiden: 2002. Brill Publishers.
- Christopher Melchert, The Formation of the Sunni Schools of Law: 9th–10th Centuries C.E., pg. 179. Leiden: Brill Publishers, 1997.
- Ignác Goldziher, The Zahiris: Their Doctrine and Their History, Brill Classics in Islam Volume 3, pg.27, Brill: Boston, 2008
- Dr. Omar A. Farrukh, Zaharism, A History of Muslim Philosophy, Ahlul Bayt Digital Islamic Library Project
- Abu Ishaq al-Faqih, Tabaqat al-Fuqaha, pg.92
- Goldziher, pg.28
- Ibn Hajar al-Asqalani, Lisan al-Mizan, v.2, pg.422
- Al-Dhahabi, Mizan al-'Itidal, v.2, pg.15
- Al-Khatib al-Baghdadi, The History of Baghdad, v.2, pg.369–370
- Abu'l-Faraj ibn al-Jawzi, Al-Muntazam fi Tarikh al-Umam, v.12, pg.236
- Al-Khatib al-Baghdadi, The History of Baghdad, v.2, pg.370–371
- Melchert, pg. 182.
- Ibn al-Nadim, Kitab al-Fihrist, pg.216
- al-Subki, Tabaqat al-Shafi'iya, v.2, pg.46
- Camilla Adang, "This Day I have Perfected Your Religion For You: A Zahiri Conception of Religious Authority", pg. 15. Taken from Speaking for Islam: Religious Authorities in Muslim Societies. Ed. Gudrun Krämer and Sabine Schmidtke. Leiden: Brill Publishers, 2006.
- Ibn al-Nadim, Kitab al-Fihrist, pg.217
- Ibn al-Nadim, Kitab al-Fihrist, pg.234
- Ibn Hajar al-Asqalani, Lisan al-Mizan. Vol. 5, pg. 173. Hyderabad: 1911.
- Ahmet T. Karamustafa, Sufism: The Formative Period, pg. 73. Berkeley: University of California Press, 2007.
- The Islamic school of law – evolution, devolution, and progress, pg. 118. Eds. Rudolph Peters and Frank E. Vogel. Cambridge: Harvard Law School, 2005.
- Encyclopaedia of Islam, vol II C-G, pg. 183. Eds. Bernard Lewis, Charles Pellat and Joseph Schacht. Assist. J. Burton-Page, C. dumont and V.L. Menage. Leiden: Brill Publishers, 1970. Photomechanical print.
- Goldziher, pg.29
- "Law, Islamic". Encyclopedia.com. Retrieved 13 March 2012.
- al-Dhahabi. Siyar A'lam Al-Nubala'. Islamweb. p. 174.
- Wahab, Muhammad Rashidi, and Syed Hadzrullathfi Syed Omar. "Peringkat Pemikiran Imam al-Ash’ari Dalam Akidah." International Journal of Islamic Thought 3 (2013): 58-70.
- Melchert, Christopher. "The Piety of the Hadith folk." International Journal of Middle East Studies 34.3 (2002): 425-439.
- Ibn Taymiyyah, al-Aqeedah al-Isfahaniyyah, pg.77
- Al-Shahrastani, Al-Milal wa al-Nihal, v.1, pg.74
- Al-Shahrastani, Al-Milal wa al-Nihal, v.1, pg.170
- Ibn Taymiyyah, Haqiqah al-Siyam, pg.35–36
- J.H. Kramers and H.A.R. Gibb, Shorter Encyclopedia of Islam, pg. 266. Ithaca: Cornell University Press, 1953.
- Sanusi Lamido Sanusi, MUSLIM COMMUNITIES IN MULTI RELIGIOUS MILIEU: Some Reflections on the Madinan Constitution, October 2003
- Ayatollah Morteza Motahhari, The Role Of Ijtihad in Legislation, Ijtihad' in the Sunni Tradition, Portal Islamica
- Walîd b. Ibrâhîm al-`Ujajî, Qiyas in Islamic Law – A Brief Introduction, Alfalah Consulting, FRIDAY, 29 APRIL 2011
- Al-Subki, Tabaqat al-Shafi'iya, v.2, pg.46
- Ibn Khaldun, Muqaddimah, edited by Franz Rosenthal, London: 1958, v.3, pg.5
- Goldziher, pg.36
- Goldziher, pg.34
- Ibn Taymiyyah, A Great Compilation of Fatwa, v.5, pg.532
- Ibn Taymiyyah, A Great Compilation of Fatwa, v.6, pg.160–161
- Ibn Taymiyyah, Minhaj as-Sunnah an-Nabawiyyah, v.2, pg.106–107
- Ibn Taymiyyah, A Great Compilation of Fatwa, v.12, pg.177
- "The Jahmite Ash'aris: The Qur'an Present With Us is 'Muhdath' Meaning (To Them) Created – Ibn Battah's (d. 387H) Refutation of the Jahmites of Old With A Clarification of the Doubts of Contemporary Jahmite Ash'aris Regarding What is 'Muhdath'". Archived from the original on 24 October 2010. Retrieved 13 March 2012.
- Muhammad Nasiruddin al-Albani, Mukhtasar al-'Uluww of Al-Dhahabi, pg.211
- Dr. Arif Khalil Abu Ubaida, Imam Dawud al-Zahiri and his Influence in Islamic Jurisprudence, pg.56
- Ibn al-Nadim, Kitab al-Fihrist, pg.81
- Yusuf al-Qaradawi, Is Wearing the Niqāb Obligatory for Women? Archived 23 March 2014 at the Wayback Machine, SuhaibWebb.com
- Salman al-Ouda, Fasting for Someone Intending Travel Archived 13 March 2012 at the Wayback Machine, Islam Today, Sat, 08/21/2010
- Qur'an, 2:185
- Ibn al-Nadim, Kitab al-Fihrist, pg.271–272
- Al-Nawawi, Tahdhib al-Asma wal-Lughat, v.1, pg.82
- Ibn Hajar al-Asqalani, Tawalli al-Ta`sis li-Ma'ali Muhammad bin Idris, pg.26
- Ibn 'Asakir, History of Damascus
- Al-Shahrastani, Al-Milal wa al-Nihal, v.1, pg.61
- The International Institute of Islamic Thought, SOURCE METHODOLOGY IN ISLAMIC JURISPRUDENCE, [http://www.islambasics.com/view.php?bkID=166&chapter=5 USUL AL FIQH �AFTER AL IMAM AL SHAFI'I] Archived 16 December 2010 at the Wayback Machine
- Devin Stewart, "Muhammad b. Dawud al-Zahiri's Manual of Jurisprudence." Taken from Studies in Islamic Law and Society Volume 15: Studies in Islamic Legal Theory. Edited by Bernard G. Weiss. Pg. 127. Leiden: 2002. Brill Publishers.
- Devin Stewart, "Muhammad b. Jarir al-Tabari's al-Bayan 'an Usul al-Ahkam and the Genre of Usul al-Fiqh in Ninth Century Baghdad," pg. 337. Taken from Abbasid Studies: Occasional Papers of the School of Abbasid Studies, Cambridge, 6–10 January 2002. Edited by James Montgomery. Leuven: Peeters Publishers and the Department of Oriental Studies, 2004.
- Abu'l-Fida, Concise History of Humanity, v.2, pg.260
- Al-Khatib al-Baghdadi, The History of Baghdad, v.2, pg.373
- Abdul Kareem Mushtaq, Shi'a Usool al-Deen, Tauheed – Belief in the Oneness of Allah Archived 9 October 2010 at the Wayback Machine, Answering Ansar
- Sunni Defense, Accusing Dāwūd al-Žāhirī, Lies of Answering Ansar, 27 September 2009
- Al-Shahrastani, Al-Milal wa al-Nihal, v.1, pg.104
- Qur'an, 38:75
- Qadi al-Nu'man, Differences Among the Schools of Law, pg. 193.
- Ibn al-Nadim, Kitab al-Fihrist, pg.172
- Imam Dawud al-Zahiri and His Effect (Arabic)