Ahmad Zarruq also known as Imam az-Zarruq (Ahmad ibn Ahmad ibn Muhammad ibn ‘Isa) (1442–1493 CE) was a Muslim scholar and Sufisheikh from Fes, Morocco. He is considered one of the most prominent and accomplished legal, theoretical, and spiritual scholars in Islamic history, and is thought by some to have been the renewer of his time (mujaddid). He was also the first to be given the honorific title "Regulator of the Scholars and Saints" (muhtasib al-‘ulama’ wa al-awliya’).
Zarruq was born on 7 June 1442 (22nd Muharram,846 of the Islamic 'Hijra' calendar) - according to Sheikh Abd Allah Gannun - in a village in the region of Tiliwan, a mountain area of Morocco. He was a Berber of the tribe of the Barnusi who lived in an area between Fes and Taza, and was orphaned of both his mother and father within the first seven days of his birth. His grandmother, an accomplished jurist, raised him and was his first teacher. Zarruq is one of the most prominent scholars in the late Maliki school but is perhaps better known as a ShadhiliSufiSheikh and founder of the Zarruqiyye branch of the ShadhiliSufi order (Tariqa). He was a contemporary of Muhammad al-Jazuli.
He took the name 'Zarruq' (meaning 'blue') and he studied the traditional Islamic sciences such as jurisprudence, Arabic, traditions of Muhammed and wrote extensively on a number of subjects. His most famous works are first of all his Qawa’id al-Tasawwuf (The Principles of Sufism), his commentaries on Maliki jurisprudence and his commentary upon the Hikam of ibn 'Ata Allah. He travelled East to Mecca in Tihamah and to Egypt before taking up residence in Misrata, Libya where he died in 899 (1493).
Anecdotes of Zarruq's childhood, travels and education appear in an untitled fahrasa and Fawa'id min Kunnash, the second being edited in its Arabic version. Selected passages appear in translation in: Zarruq the Sufi: a Guide in the Way and a Leader to the Truth by Ali Fahmi Khushaim (Tripoli, Libya:General Company for Publication, 1976)
Zaineb S. Istrabadi, Qawa’id al-Tasawwuf, The Principles of Sufism, annotated translation with introduction, Phd thesis with extensive information on his life, times, contemporaries and interpretation of the text (pdf-file) 
Foundations of the spiritual path by Sidi Ahmad Zarruq, translated by Hamza Yusuf (pdf-file)