Sunan At-Tirmidhi

Narrated Jabalah bin Suhaim :That a man asked Ibn 'Umar about the Udhiyah, ""Is it obligatory?"" So he said: ""The Messenger of Allah (ﷺ) performed the Udhiyah as did the Muslims."" He repeated the question. So he said: ""Do you understand ?"" The Messenger of Allah (ﷺ) slaughtered as did the Muslims