Narrated from Aisha (may Allah be pleased with her), she said: There were still five days left in Dhu al-Qi'dah when we set out with the Prophet (peace be upon him) with the intention of Hajj. When we were at Sarif or near it, the Prophet (peace be upon him) ordered that whoever did not have a sacrificial animal should turn his ihram (for Hajj) into an ihram for Umrah. And when we were in Mina, beef was brought to me. I asked, "What kind of meat is this?" It was said: "The Messenger of Allah (peace be upon him) has offered a sacrifice on behalf of his wives." Yahya said: I narrated this hadith to Qasim bin Muhammad, and he said, "Umrah! By Allah, you have brought the hadith in its original form."
Hadith Referenceمسند الإمام الشافعي / كتاب الحج / 801
Hadith Takhrijاخرجه البخاري، الحج، باب وما يأكل من البدن وما يتصدق (1720) ومسلم، الحج، باب بيان وجوه الاحرام وأنه يجوز افراد الحج ... الخ (1211)۔