Sahih Muslim Book - 35, Hadith - 5073

وحَدَّثَنَا مُحَمَّدُ بْنُ الْمُثَنَّى ، وَابْنُ بَشَّارٍ ، وَاللَّفْظُ لاِبْنِ الْمُثَنَّى ، قَالاَ: حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ ، حَدَّثَنَا شُعْبَةُ ، عَنْ زُبَيْدٍ الإِيَامِيِّ ، عَنِ الشَّعْبِيِّ ، عَنِ الْبَرَاءِ بْنِ عَازِبٍ ، قَالَ: قَالَ رَسُولُ اللهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: إِنَّ أَوَّلَ مَا نَبْدَأُ بِهِ فِي يَوْمِنَا هَذَا نُصَلِّي ، ثُمَّ نَرْجِعُ فَنَنْحَرُ ، فَمَنْ فَعَلَ ذَلِكَ ، فَقَدْ أَصَابَ سُنَّتَنَا ، وَمَنْ ذَبَحَ ، فَإِنَّمَا هُوَ لَحْمٌ قَدَّمَهُ لأَهْلِهِ لَيْسَ مِنَ النُّسُكِ فِي شَيْءٍ ، وَكَانَ أَبُو بُرْدَةَ بْنُ نِيَارٍ قَدْ ذَبَحَ ، فَقَالَ: عِنْدِي جَذَعَةٌ خَيْرٌ مِنْ مُسِنَّةٍ ، فَقَالَ: اذْبَحْهَا وَلَنْ تَجْزِيَ عَنْ أَحَدٍ بَعْدَكَ.

It was narrated that Al-Bara' bin 'Azib said: "The Messenger of Allah (s.a.w) said: 'The first thing with which we begin on this day (the day of 'Eid) of ours is the prayer; we pray, then we go back and offer the sacrifice. Whoever does that has attained our Sunnah, and whoever has already slaughtered (the sacrificial animal), that is just meat that he has given to his family, and there is nothing of the sacrifice in it.' Abu Burdah bin Niyar had already slaughtered (his sacrificial animal) and he said: 'I have a Jadh'ah that is better than a Musinnah.' He (s.a.w) said: 'Slaughter it, but it will not will not suffice for anyone else after you."'