question #3 Sahih al-Bukhari 7400, Book 97, Hadith 29 : What should one do if they have slaughtered their sacrifice before the prayer on the Day of Nahr?

That he witnessed the Prophet (ﷺ) on the Day of Nahr. The Prophet (ﷺ) offered prayer and then delivered a
sermon saying, “Whoever slaughtered his sacrifice before offering prayer, should slaughter another
animal in place of the first; and whoever has not yet slaughtered any, should slaughter a sacrifice and
mention Allah’s Name while doing so.”