Musnad Abu Ya'la al-Mawsili 108:25

'Abd al-A'la narrated to us, Hammad narrated to us, from 'Abdullah bin Muhammad bin 'Aqil, from 'Abd al-Rahman bin Jabir, from Jabir bin 'Abdullah, who said: The Messenger of Allah (ﷺ) was brought two horned, black-and-white, large, castrated rams. He laid one of them down and said: "In the name of Allah, and Allah is the Greatest. O Allah, [this is] on behalf of Muhammad and the family of Muhammad." Then he laid the other one down and said: "In the name of Allah, and Allah is the Greatest, on behalf of Muhammad and his nation, [from among] those who testified to Your Oneness and testified to my delivery [of the message]."