Sahih Bukhari Volume 8, Book 83, Hadith 6675

قَالَ أَبُو عَبْدِ اللَّهِ كَتَبَ إِلَىَّ مُحَمَّدُ بْنُ بَشَّارٍ حَدَّثَنَا مُعَاذُ بْنُ مُعَاذٍ، حَدَّثَنَا ابْنُ عَوْنٍ، عَنِ الشَّعْبِيِّ، قَالَ قَالَ الْبَرَاءُ بْنُ عَازِبٍ وَكَانَ عِنْدَهُمْ ضَيْفٌ لَهُمْ فَأَمَرَ أَهْلَهُ أَنْ يَذْبَحُوا قَبْلَ أَنْ يَرْجِعَ، لِيَأْكُلَ ضَيْفُهُمْ، فَذَبَحُوا قَبْلَ الصَّلاَةِ، فَذَكَرُوا ذَلِكَ لِلنَّبِيِّ صلى الله عليه وسلم فَأَمَرَهُ أَنْ يُعِيدَ الذَّبْحَ‏.‏ فَقَالَ يَا رَسُولَ اللَّهِ عِنْدِي عَنَاقٌ جَذَعٌ، عَنَاقُ لَبَنٍ هِيَ خَيْرٌ مِنْ شَاتَىْ لَحْمٍ‏.‏ فَكَانَ ابْنُ عَوْنٍ يَقِفُ فِي هَذَا الْمَكَانِ عَنْ حَدِيثِ الشَّعْبِيِّ، وَيُحَدِّثُ عَنْ مُحَمَّدِ بْنِ سِيرِينَ بِمِثْلِ هَذَا الْحَدِيثِ، وَيَقِفُ فِي هَذَا الْمَكَانِ وَيَقُولُ لاَ أَدْرِي أَبَلَغَتِ الرُّخْصَةُ غَيْرَهُ أَمْ لاَ‏.‏ رَوَاهُ أَيُّوبُ عَنِ ابْنِ سِيرِينَ عَنْ أَنَسٍ عَنِ النَّبِيِّ صلى الله عليه وسلم‏.

Narrated Al-Bara bin Azib that once he had a guest, so he told his family (on the Day of Id-ul-Adha) that they should slaughter the animal for sacrifice before he returned from the ('Id) prayer in order that their guest could take his meal. So his family slaughtered (the animal) before the prayer. Then they mentioned that event to the Prophet who ordered Al-Bara to slaughter another sacrifice. Al-Bara' said to the Prophet , "I have a young milch she-goat which is better than two sheep for slaughtering." (The sub-narrator, Ibn 'Aun used to say, "I don't know whether the permission (to slaughter a she-goat as a sacrifice) was especially given to Al-Bara' or if it was in general for all the Muslims.")