This Surah takes its name from vv. 136, 138 and 139 in which some superstitious beliefs of the idolatrous Arabs concerning the lawfulness of some cattle (an`am) and the unlawfulness of some others have been refuted.
Period of Revelation
According to a tradition of Ibn Abbas, the whole of the Surah was revealed at one sitting at Makkah. Asma, a daughter of Yazid and a first cousin of Hadrat Mu'az-bin Jabl, says, "During the revelation of this Surah, the Holy Prophet was riding on a she-camel and I was holding her nose-string. The she-camel began to feel the weight so heavily that it seemed as if her bones would break under it." We also learn from other traditions that the Holy Prophet dictated the whole of the Surah the same night that it was revealed.
Its subject-matter clearly shows that it must have been revealed during the last year of the Holy Prophet's life at Makkah. The tradition of Asma, daughter of Yazid, also confirms this. As she belonged to the Ansar and embraced Isl