Bulugh al-Maram #1542

Muslim has also reported on the authority of 'Aishah (RAA), "Allah's Messenger (ﷺ) ordered a horned ram with black legs, a black belly and black around its eyes, and it was brought for him to sacrifice and he said to 'Aishah (RAA), "Aishah, get the knife." Then he said, "Sharpen it with a stone." When she had done so he took it, then taking it (the ram) he placed it on the ground and slaughtered it. He then said, "Bismillah (In the name of Allah), O Allah, accept it from Muhammad, Muhammad's family and from Muhammad's Ummah (followers)." (Then he sacrificed it.'