(2) باب سِنِّ الأُضْحِيَةِ
Uqba b. 'Amir reported that Allah's Messenger (ﷺ) gave the gifts of goats to be distributed amongst his Companions. They sacrificed them, but a lamb of one year of age was left. (Someone) made a mention of that to the Messenger of Allah (ﷺ), whereupon he said:
You sacrifice it.
Reference: Sahih Muslim 1965 a
In-book reference: Book 35, Hadith 21
USC-MSA web (English) reference(deprecated numbering scheme): Book 22, Hadith 4838