The Prophet ﷺ said, "Whoever slaughtered the sacrifice before the ʿId prayer, should repeat it (slaughter another one)." A man said "This is the day on which meat is desired." Then he mentioned the need of his neighbors (for meat) and the Prophet ﷺ seemed to accept his excuse. The man said, "I have a Jadha'a which is to me better than two sheep." The Prophet ﷺ allowed him (to slaughter it as a sacrifice). But I do not know whether this permission was general for all Muslims or not. The Prophet ﷺ then went towards two rams and slaughtered them, and the people went towards their sheep and slaughtered them.  

عَنِ النَّبِيِّ ﷺ قَالَ مَنْ ذَبَحَ قَبْلَ الصَّلاَةِ فَلْيُعِدْ فَقَالَ رَجُلٌ هَذَا يَوْمٌ يُشْتَهَى فِيهِ اللَّحْمُ وَذَكَرَ مِنْ جِيرَانِهِ فَكَأَنَّ النَّبِيَّ ﷺ عَذَرَهُ وَعِنْدِي جَذَعَةٌ خَيْرٌ مِنْ شَاتَيْنِ فَرَخَّصَ لَهُ النَّبِيُّ ﷺ فَلاَ أَدْرِي بَلَغَتِ الرُّخْصَةُ أَمْ لاَ ثُمَّ انْكَفَأَ إِلَى كَبْشَيْنِ يَعْنِي فَذَبَحَهُمَا ثُمَّ انْكَفَأَ النَّاسُ إِلَى غُنَيْمَةٍ فَذَبَحُوهَا  

I witnessed the Prophet ﷺ on the Day of Nahr. He said, "Whoever slaughtered the sacrifice before offering the ʿId prayer, should slaughter another sacrifice in its place; and whoever has not slaughtered their sacrifice yet, should slaughter now."  

شَهِدْتُ النَّبِيَّ ﷺ يَوْمَ النَّحْرِ فَقَالَ مَنْ ذَبَحَ قَبْلَ أَنْ يُصَلِّيَ فَلْيُعِدْ مَكَانَهَا أُخْرَى وَمَنْ لَمْ يَذْبَحْ فَلْيَذْبَحْ  

One day Messenger of Allah ﷺ offered the ʿId prayer and said, "Whoever offers our prayer and faces our Qibla should not slaughter the sacrifice till he finishes the ʿId prayer." Abu Burda bin Niyar got up and said, "O Messenger of Allah ﷺ! I have already done it. The Prophet ﷺ said, "That is something you have done before its due time." Abu Burda said, "I have a Jadha'a which is better than two old sheep; shall I slaughter it?" The Prophet ﷺ said, "Yes, but it will not be sufficient for anyone after you."  

صَلَّى رَسُولُ اللَّهِ ﷺ ذَاتَ يَوْمٍ فَقَالَ مَنْ صَلَّى صَلاَتَنَا وَاسْتَقْبَلَ قِبْلَتَنَا فَلاَ يَذْبَحْ حَتَّى يَنْصَرِفَ فَقَامَ أَبُو بُرْدَةَ بْنُ نِيَارٍ فَقَالَ يَا رَسُولَ اللَّهِ فَعَلْتُ فَقَالَ هُوَ شَىْءٌ عَجَّلْتَهُ قَالَ فَإِنَّ عِنْدِي جَذَعَةً هِيَ خَيْرٌ مِنْ مُسِنَّتَيْنِ آذْبَحُهَا قَالَ نَعَمْ ثُمَّ لاَ تَجْزِي عَنْ أَحَدٍ بَعْدَكَ قَالَ عَامِرٌ هِيَ خَيْرُ نَسِيكَتِهِ