`Aqīqah or Akika (Arabic: عقيقة) is the Islamic tradition of the sacrifice of an animal on the occasion of a child's birth. It is widely performed by Muslims and it is considered sunnah to slaughter one sheep for the baby girl and two sheep for the baby boy. Aqiqah is a Sunnat al Mu'akkadah (confirmed sunnah). If the guardian of the child is capable of slaughtering two sheep for a baby boy and one sheep for a female child, he should do it. Muhammed said : “A baby is being pledged for his Aqiqah, sacrifice is made for him on the seventh day, his head is shaved, and a name is given him". If one cannot slaughter on the seventh day, one may slaughter on the fourteenth day or on the twenty-first day. If one is not capable of doing so, then one may slaughter any time before the puberty of the child. 
- The sacred meadows : a structural analysis of religious symbolism in an East African town / by Abdul Hamid M. el Zein.
- 'Raise your voices and kill your animals' : Islamic discourses on the Idd el-Hajj and sacrifices in Tanga (Tanzania) : authoritative texts, ritual practices and social identities / by Gerard C. van de Bruinhorst full text
- Sunan al-Tirmidhi, hadith #1522–1524