Jami` at-Tirmidhi, Book 19, Hadith 10 (In-Book) ⓘ
Narrated 'Uqbah bin 'Amir: That the Messenger of Allah gave him sheep to distribute among his Companions as a sacrifice. "There remained a young male kid or a young billy goat, so I mentioned that to the Messenger of Allah and he said: 'Sacrifice it for yourself.'" Waki' said: "The Jadha' among sheep is seven or six months."
حَدَّثَنَا قُتَيْبَةُ، حَدَّثَنَا اللَّيْثُ، عَنْ يَزِيدَ بْنِ أَبِي حَبِيبٍ، عَنْ أَبِي الْخَيْرِ، عَنْ عُقْبَةَ بْنِ عَامِرٍ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم أَعْطَاهُ غَنَمًا يَقْسِمُهَا عَلَى أَصْحَابِهِ ضَحَايَا فَبَقِيَ عَتُودٌ أَوْ جَدْىٌ فَذَكَرْتُ ذَلِكَ لِرَسُولِ اللَّهِ صلى الله عليه وسلم فَقَالَ " ضَحِّ بِهِ أَنْتَ " . قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ . قَالَ وَكِيعٌ الْجَذَعُ مِنَ الضَّأْنِ يَكُونُ ابْنَ سِتَّةِ أَوْ سَبْعَةِ أَشْهُرٍ .
also referenced under: Hadith 1500 (Reference) & Volume 3, Book 17, Hadith 1500 (DarusSalam)