"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.'" (Using translation from Nasāʾī 1563)  

خَطَبَ النَّبِيُّ ﷺ يَوْمَ النَّحْرِ فَقَالَ «إِنَّ أَوَّلَ مَا نَبْدَأُ بِهِ فِي يَوْمِنَا هَذَا أَنَّا نُصَلِّي ثُمَّ نَذْبَحُ فَمَنْ فَعَلَ ذَلِكَ فَقَدْ أَصَابَ سُنَّتَنَا وَمَنْ ذَبَحَ قَبْلَ ذَلِكَ فَإِنَّمَا هُوَ لَحْمٌ يُقَدِّمُهُ لِأَهْلِهِ» قَالَ فَذَبَحَ أَبُو بُرْدَةَ بْنُ نِيَارٍ قَبْلَ ذَلِكَ فَقَالَ يَا رَسُولَ اللهِ عِنْدِي جَذَعَةٌ خَيْرٌ مِنْ مُسِنَّةٍ قَالَ «اذْبَحْهَا وَلَنْ تُوُفِّيَ عَنْ أَحَدٍ بَعْدَكَ»  

The Prophet ﷺ said, "The first thing that we should do on this day of ours is to pray and then return to slaughter the sacrifice. So anyone who does so, he acted according to our Sunna (tradition), and whoever slaughtered the sacrifice before the prayer, it was just meat which he presented to his family and would not be considered as Nusuk." A person from the Ansar named Abu Burda bin Niyyar said, "O Messenger of Allah ﷺ! I slaughtered the Nusuk (before the prayer) but I have a young shegoat which is better than an older sheep." The Prophet ﷺ I said, "Sacrifice it in lieu of the first, but it will be not sufficient (as a sacrifice) for anybody else after you." (Using translation from Bukhārī 965)   

خَطَبَنَا رَسُولُ اللهِ ﷺ فَقَالَ «إِنَّ أَوَّلَ مَا نَبْدَأُ بِهِ فِي يَوْمِنَا هَذَا أَنْ نُصَلِّي ثُمَّ نَرْجِعُ فَنَنْحَرُ فَمَنْ فَعَلَ فَقَدْ أَصَابَ سُنَّتَنَا وَمَنْ ذَبَحَ قَبْلَ ذَلِكَ فَإِنَّمَا هُوَ لَحْمٌ قَدَّمَهُ لِأَهْلِهِ لَيْسَ مِنَ النُّسُكِ فِي شَيْءٍ» قَالَ وَذَبَحَ خَالِي أَبُو بُرْدَةَ بْنِ نِيَارٍ قَالَ يَا رَسُوَل اللهِ ذَبَحْتُ وَعِنْدِي جَذَعَةً خَيْرٌ مِنْ مُسِنَّةٍ قَالَ «اجْعَلْهَا مَكَانَهَا وَلَمْ تُجْزِئْ أَوْ تُوفِ عَنْ أَحَدٍ بَعْدَكَ»