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."
Sahih al-Bukhari Book 73, Hadith 12
← Previous Hadith that the Prophet (ﷺ) gave him some sheep to distribute among his companions to slaughter as sacrifices (`Id--al--Adha). A kid goat was left and he told the Prophet (ﷺ) of that whereupon he said to him, "Slaughter it as a sacrifice (on your behalf).

Sahih al-Bukhari Book 73, Hadith 11 Next Hadith → Abu Burda slaughtered (the sacrifice) before the (`Id) prayer whereupon the Prophet (ﷺ) said to him, "Slaughter another sacrifice instead of that." Abu Burda said, "I have nothing except a Jadha'a." (Shu`ba said: Perhaps Abu Burda also said that Jadha'a was better than an old sheep in his opinion.) The Prophet (ﷺ) said, "(Never mind), slaughter it to make up for the other one, but it will not be sufficient for anyone else after you."

Sahih al-Bukhari Book 73, Hadith 13