(2) باب قِسْمَةِ الإِمَامِ الأَضَاحِيَّ بَيْنَ النَّاسِ
Narrated `Uqba bin 'Amir Al-Juhani:
that the Prophet (ﷺ) distributed among his companions some animals for sacrifice (to be slaughtered on `Id-al-Adha). `Uqba's share was a Jadha'a (a six month old goat). `Uqba said, "O Allah's Messenger (ﷺ)! I get in my share of Jadha'a (a six month old ram)." The Prophet (ﷺ) said, "Slaughter it as a sacrifice."
Reference: Sahih al-Bukhari 5547
In-book reference: Book 73, Hadith 3
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 7, Book 68, Hadith 455