I was present when the Messenger of Allah ﷺ prayed on the day of sacrifice and then delivered a sermon. He said, "Whoever slaughtered before praying must slaughter another in its place, and whoever has not yet slaughtered, let him slaughter in the name of Allah."
حدثنا محمد بن المثنى وابن بشار قالا حدثنا محمد بن جعفر حدثنا شعبة بهذا الإسناد مثله