On the day of Nahr the Prophet (ﷺ) offered the prayer and delivered the Khutba and then slaughtered the sacrifice and said, "Anybody who slaughtered (his sacrifice) before the prayer should slaughter another animal in lieu of it, and the one who has not yet slaughtered should slaughter the sacrifice mentioning Allah's name on it."
Sahih al-Bukhari Book 13, Hadith 34
← Previous Hadith Allah's Messenger (ﷺ) offered the prayer on the day of Nahr and then delivered the Khutba and ordered that whoever had slaughtered his sacrifice before the prayer should repeat it, that is, should slaughter another sacrifice. Then a person from the Ansar stood up and said, "O Allah's Messenger (ﷺ)! because of my neighbors (he described them as being very needy or poor) I slaughtered before the prayer. I have a young she-goat which, in my opinion, is better than two sheep." The Prophet (ﷺ) gave him the permission for slaughtering it as a sacrifice.

Sahih al-Bukhari Book 13, Hadith 33 Next Hadith → On the Day of `Id the Prophet (ﷺ) used to return (after offering the `Id prayer) through a way different from that by which he went.

Sahih al-Bukhari Book 13, Hadith 35