Sahih Bukhari Volume 007, Book 068, Hadith Number 472.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 68. Al-Adha Festival Sacrifice (Adaahi)
Narrated By Anas : The Prophet offered as sacrifices, two horned rams, black and white in color. He slaughtered them with his own hands and mentioned Allah's Name over them and said Takbir and put his foot on their sides.