Once during the lifetime of Messenger of Allah ﷺ we offered some animals as sacrifices. Some people slaughtered their sacrifices before the (Id) prayer, so when the Prophet ﷺ finished his prayer, he saw that they had slaughtered their sacrifices before the prayer. He said, "Whoever has slaughtered (his sacrifice) before the prayer, should slaughter (another sacrifice) in lieu of it; and whoever has not yet slaughtered it till we have prayed; should slaughter (it) by mentioning Allah's Name."  

ضَحَّيْنَا مَعَ رَسُولِ اللَّهِ ﷺ أُضْحِيَّةً ذَاتَ يَوْمٍ فَإِذَا أُنَاسٌ قَدْ ذَبَحُوا ضَحَايَاهُمْ قَبْلَ الصَّلاَةِ فَلَمَّا انْصَرَفَ رَآهُمُ النَّبِيُّ ﷺ أَنَّهُمْ قَدْ ذَبَحُوا قَبْلَ الصَّلاَةِ فَقَالَ مَنْ ذَبَحَ قَبْلَ الصَّلاَةِ فَلْيَذْبَحْ مَكَانَهَا أُخْرَى وَمَنْ كَانَ لَمْ يَذْبَحْ حَتَّى صَلَّيْنَا فَلْيَذْبَحْ عَلَى اسْمِ اللَّهِ  

I was with Messenger of Allah ﷺ (on the occasion) of 'Id al-Adha. After he had completed the prayer with people, he found that the goats had been slaughtered, whereupon he said: He who slaughtered sacrificial animal before the prayer should slaughter a goat (again) in its stead and he who has not slaughtered he should slaughter it by reciting the name of Allah.  

شَهِدْتُ الأَضْحَى مَعَ رَسُولِ اللَّهِ ﷺ فَلَمَّا قَضَى صَلاَتَهُ بِالنَّاسِ نَظَرَ إِلَى غَنَمٍ قَدْ ذُبِحَتْ فَقَالَ مَنْ ذَبَحَ قَبْلَ الصَّلاَةِ فَلْيَذْبَحْ شَاةً مَكَانَهَا وَمَنْ لَمْ يَكُنْ ذَبَحَ فَلْيَذْبَحْ عَلَى اسْمِ اللَّهِ  

"I attended (the day of) sacrifice with the Messenger of Allah He led the people 9in prayer, then when he finished praying he saw some sheep that had been sacrificed. He said 'Whoever slaughtered (his sacrifice) before the prayer. Let him slaughtered (his sacrifice) before the prayer, let him slaughter a sheep in its place, and whoever has not slaughtered, let him offer a sacrifice in the name of Allah, the Mighty and Sublime."'  

شَهِدْتُ أَضْحَى مَعَ رَسُولِ اللَّهِ ﷺ فَصَلَّى بِالنَّاسِ فَلَمَّا قَضَى الصَّلاَةَ رَأَى غَنَمًا قَدْ ذُبِحَتْ فَقَالَ مَنْ ذَبَحَ قَبْلَ الصَّلاَةِ فَلْيَذْبَحْ شَاةً مَكَانَهَا وَمَنْ لَمْ يَكُنْ ذَبَحَ فَلْيَذْبَحْ عَلَى اسْمِ اللَّهِ ﷻ  

"We slaughtered the sacrifice with the Messenger of Allah on day, and the people slaughtered their sacrifices before the prayer. When he finished (the prayer) the Prophet saw that they had slaughtered their sacrifices before the prayer. He said: "Whoever slaughtered his sacrifice before the prayer, let him slaughter another in its place, and whoever did not slaughter his sacrifice until we had prayed, let him slaughter it in the name of Allah, The Mighty and Sublime," (Sahih )  

ضَحَّيْنَا مَعَ رَسُولِ اللَّهِ ﷺ أَضْحَى ذَاتَ يَوْمٍ فَإِذَا النَّاسُ قَدْ ذَبَحُوا ضَحَايَاهُمْ قَبْلَ الصَّلاَةِ فَلَمَّا انْصَرَفَ رَآهُمُ النَّبِيُّ ﷺ أَنَّهُمْ ذَبَحُوا قَبْلَ الصَّلاَةِ فَقَالَ مَنْ ذَبَحَ قَبْلَ الصَّلاَةِ فَلْيَذْبَحْ مَكَانَهَا أُخْرَى وَمَنْ كَانَ لَمْ يَذْبَحْ حَتَّى صَلَّيْنَا فَلْيَذْبَحْ عَلَى اسْمِ اللَّهِ ﷻ  

"We slaughtered the sacrifice with the Messenger of Allah on day, and the people slaughtered their sacrifices before the prayer. When he finished (the prayer) the Prophet saw that they had slaughtered their sacrifices before the prayer. He said: "Whoever slaughtered his sacrifice before the prayer, let him slaughter another in its place, and whoever did not slaughter his sacrifice until we had prayed, let him slaughter it in the name of Allah, The Mighty and Sublime," (Sahih ) (Using translation from Nasāʾī 4398)   

ضَحَّيْنَا مَعَ رَسُولِ اللَّهِ ﷺ فَإِذَا نَاسٌ ذَبَحُوا ضَحَايَاهُمْ قَبْلَ الصَّلَاةِ فَلَمَّا انْصَرَفَ رَآهُمُ النَّبِيُّ ﷺ قَدْ ذَبَحُوا قَبْلَ الصَّلَاةِ فَقَالَ «مَنْ ذَبَحَ قَبْلَ الصَّلَاةِ فَلْيَذْبَحْ مَكَانَهَا أُخْرَى وَمَنْ لَمْ يَذْبَحْ حَتَّى صَلَّيْنَا فَلْيَذْبَحْ عَلَى اسْمِ اللَّهِ»