Sahih al-Bukhari 5556
صحيح البخاري#5556SahihNarrated Al-Bara' bin `Azib:An uncle of mine called Abu Burda, slaughtered his sacrifice before the `Id prayer. So Allah's Messenger (ﷺ) said to him, "Your (slaughtered) sheep was just mutton (not a sacrifice)." Abu Burda said, "O Allah's Apostle! I have got a domestic kid goat." The Prophet (ﷺ) said, "Slaughter it (as a sacrifice) but it will not be permissible for anybody other than you" The Prophet (ﷺ) added, "Whoever slaughtered his sacrifice before the (`Id) prayer, he only slaughtered for himself, and whoever slaughtered it after the prayer, he offered his sacrifice properly and followed the tradition of the Muslims
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 73:12