Sahih Bukhari
Sahih Bukhari Volume 007, Book 068, Hadith Number 462.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 68. Al-Adha Festival Sacrifice (Adaahi)
Narrated By '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)."