Volume 3 · Book 44 · Hadith 679
Narrated 'Uqba bin 'Amir: that Allah's Apostle gave him some sheep to distribute among his companions in order to sacrifice them and a kid was left. He told the Prophet about it and the Prophet said to him, "Sacrifice it on your behalf."
— Sahih Bukhari, Volume 3, Book 44: Partnership, Hadith #679