Ibrahim's absolute devotion drew the attention of Allah, who sent Archangel Jibreel, carrying a lamb to the slaughter. In response to Abraham's devotion, Jibreel told Ibrahim he had sent the sheep in place of Ibrahim's son to be slaughtered in response to his dedication. Since then, cattle sacrifices have been an integral part of the celebration of Eid-ul-Adha. On the tenth day of Zul Hijjah, Eid-ul-Adha is also called Bakra Eid, but the ninth day of Zul Hijjah is devoted to the hajj, a pilgrimage of Muslims. Eid-ul-Adha commemorates the absolute dedication of Prophet Ibrahim to Allah.Following the prayer, the Imam delivers a sermon or khutbah. There are later celebrations that include eating delicious food, donating to the poor, and sharing the joy with family, relatives, and friends.