سنن النسائي

Al-Bara' bin 'Azib narrated to us by one of the pillars of the masjid: "The Prophet (ﷺ) delivered a Khutbah on the day of An-Nahr and said: 'The first thing we start with on this day of ours is the prayer, then we offer sacrifice. Whoever does that, he has followed our sunnah, but whoever slaughtered (his sacrifice) before the (prayer), that is just meat that he gave to his family. Abu Burdah bin Niyar had slaughtered his sacrifice and he said: 'O Messenger of Allah (ﷺ), I have a Jadha'ah that is better than a Musinnah.' He said: 'Slaughter it (as a sacrifice), but that will not be sufficient for anyone else (as a sacrifice) after you.'"