Sahih Bukhari Volume 2, Book 13, Hadith 955

حَدَّثَنَا مُسَدَّدٌ، قَالَ حَدَّثَنَا إِسْمَاعِيلُ، عَنْ أَيُّوبَ، عَنْ مُحَمَّدٍ، عَنْ أَنَسٍ، قَالَ قَالَ النَّبِيُّ صلى الله عليه وسلم ‏"‏ مَنْ ذَبَحَ قَبْلَ الصَّلاَةِ فَلْيُعِدْ ‏"‏‏.‏ فَقَامَ رَجُلٌ فَقَالَ هَذَا يَوْمٌ يُشْتَهَى فِيهِ اللَّحْمُ‏.‏ وَذَكَرَ مِنْ جِيرَانِهِ فَكَأَنَّ النَّبِيَّ صلى الله عليه وسلم صَدَّقَهُ، قَالَ وَعِنْدِي جَذَعَةٌ أَحَبُّ إِلَىَّ مِنْ شَاتَىْ لَحْمٍ، فَرَخَّصَ لَهُ النَّبِيُّ صلى الله عليه وسلم فَلاَ أَدْرِي أَبَلَغَتِ الرُّخْصَةُ مَنْ سِوَاهُ أَمْ لاَ

Narrated By Anas : The Prophet said, "Whoever slaughtered (his sacrifice) before the 'Id prayer, should slaughter again." A man stood up and said, "This is the day on which one has desire for meat," and he mentioned something about his neighbours. It seemed that the Prophet I believed him. Then the same man added, "I have a young she-goat which is dearer to me than the meat of two sheep." The Prophet permitted him to slaughter it as a sacrifice. I do not know whether that permission was valid only for him or for others as well.