Musnad Ahmad 33:778

Qutaybah narrated to us, Ya'qub narrated to us, from 'Amr, from al-Muttalib, from Jabir ibn 'Abd Allah, who said: I witnessed the Eid al-Adha with the Messenger of Allah, may Allah bless him and grant him peace, at the prayer ground. When he finished his sermon, he descended from his pulpit, and a ram was brought to him. The Messenger of Allah, may Allah bless him and grant him peace, slaughtered it with his own hand and said: "In the name of Allah, and Allah is the Greatest. This is on my behalf, and on behalf of whoever from my nation has not offered a sacrifice."