Then he proceeded to the place of sacrifice and slaughtered sixty-three camels with his own hand. He then handed the knife to Ali, who slaughtered the rest, and the Prophet ﷺ made him a partner in his sacrificial offering. He then ordered that a piece be taken from each camel and placed in a pot, which was cooked. They both ate from its meat and drank from its broth... the hadith continues.
ثم انصرف إلى المنحر، فنحر ثلاثا وستين بيده، ثم أعطى عليا، فنحر ما غبر، وأشركه في هديه، ثم أمر من كل بدنة ببضعة، فجعلت فى قدر، فطبخت، فأكلا من لحمها، وشربا من مرقها… الحديث.
Muslim narrated it in the Hajj chapter (1218) via Hatim bin Ismail Madani, from Jafar bin Muhammad bin Ali bin Husayn bin Abu Talib, from his father, from Jabir, who mentioned it in the long hadith describing the Hajj of the Prophet ﷺ.