Sahih Bukhari
Al-Adha Festival Sacrifice (Adaahi)
Volume: 007 / Book Number: 068 / Hadith Number: 462
Narrated 'Uqba bin 'Amir:
that the Prophet gave him some sheep to distribute among his companions to slaughter as sacrifices ('Id--al--Adha). A kid was left and he told the Prophet of that whereupon he said to him, "Slaughter it as a sacrifice (on your behalf)."