Sahih al-Bukhari 5560
Narrated Al-Bara':
I heard the Prophet (ﷺ) delivering a sermon, and he said (on the Day of `Id-Allah. a), "The first thing we 
will do on this day of ours is that we will offer the `Id prayer, then we will return and slaughter our 
sacrifices; and whoever does so, then indeed he has followed our tradition, and whoever slaughtered 
his sacrifice (before the prayer), what he offered was just meat that he presented to his family, and that 
was not a sacrifice." Abu Burda got up and said, "O Allah's Messenger (ﷺ)! I slaughtered the sacrifice before 
the prayer and I have got a Jadha'a which is better than an old sheep." The Prophet (ﷺ) said, "Slaughter it 
to make up for that, but it will not be sufficient for anybody else after you."
حَدَّثَنَا حَجَّاجُ بْنُ الْمِنْهَالِ، حَدَّثَنَا شُعْبَةُ، قَالَ أَخْبَرَنِي زُبَيْدٌ، قَالَ سَمِعْتُ الشَّعْبِيَّ، عَنِ الْبَرَاءِ ـ رضى الله عنه ـ قَالَ سَمِعْتُ النَّبِيَّ صلى الله عليه وسلم يَخْطُبُ فَقَالَ ‏"‏ إِنَّ أَوَّلَ مَا نَبْدَأُ مِنْ يَوْمِنَا هَذَا أَنْ نُصَلِّيَ، ثُمَّ نَرْجِعَ فَنَنْحَرَ، فَمَنْ فَعَلَ هَذَا فَقَدْ أَصَابَ سُنَّتَنَا، وَمَنْ نَحَرَ فَإِنَّمَا هُوَ لَحْمٌ يُقَدِّمُهُ لأَهْلِهِ، لَيْسَ مِنَ النُّسُكِ فِي شَىْءٍ ‏"‏‏.‏ فَقَالَ أَبُو بُرْدَةَ يَا رَسُولَ اللَّهِ ذَبَحْتُ قَبْلَ أَنْ أُصَلِّيَ، وَعِنْدِي جَذَعَةٌ خَيْرٌ مِنْ مُسِنَّةٍ‏.‏ فَقَالَ ‏"‏ اجْعَلْهَا مَكَانَهَا، وَلَنْ تَجْزِيَ أَوْ تُوفِيَ عَنْ أَحَدٍ بَعْدَكَ ‏"‏‏.‏