Ubaidullah bin 'Umar bin Hafs عبيد الله بن عمر بن حفص بن عاصم · The Book on Sacrifices

"We performed the Nahr (sacrifice) with the Messenger of Allah (ﷺ) at Al-Hudaibiyyah: A camel for seven (persons) and a cow for seven (persons)."

"The Messenger of Allah (ﷺ) stayed in Al-Madinah for ten years performing the Udhiyah.

"I attended the Eid Al-Adha' with the Prophet (ﷺ) at the Musalla. When he finished his Khutbah, he descended from his Minbar and was given a male sheep. The Messenger of Allah (ﷺ) slaughtered it with his hand and said: 'Bismillah, Wa Allahu Akbar, this from me and whoever does not slaughter from my Ummah.'"