Volume 2 · Book 26 · Hadith 770
Narrated Sahl bin Bakkar: The narration of Anas abridged, saying, "The Prophet slaughtered seven Budn (camels) while standing, with his own hands. On the day of 'Id-ul-Adha he slaughtered (sacrificed) two horned rams, black and white in color.
— Sahih Bukhari, Volume 2, Book 26: Pilgrimmage (Hajj), Hadith #770