Lady Aisha (may Allah be pleased with her) narrates that we set out with the Messenger of Allah (peace and blessings be upon him) (for Hajj). On the day of sacrifice, beef was brought to us, so I asked: What is this? It was said that the Messenger of Allah (peace and blessings be upon him) has offered sacrifice on behalf of his wives. Yahya says: I narrated this to Qasim, so he said: By Allah! You have received an authentic hadith.