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." (Using translation from Bukhārī 5500)  

ضَحَّيْنَا مَعَ رَسُولِ اللهِ ﷺ أَضْحَى ذَاتَ يَوْمٍ فَإِذَا النَّاسُ قَدْ ذَبَحُوا ضَحَايَاهُمْ قَبْلَ الصَّلَاةِ فَلَمَّا انْصَرَفَ رَآهُمُ النَّبِيُّ ﷺ أَنَّهُمْ ذَبَحُوا قَبْلَ الصَّلَاةِ قَالَ «مَنْ ذَبَحَ قَبْلَ الصَّلَاةِ فَلْيَذْبَحْ مَكَانَهَا أُخْرَى وَمَنْ كَانَ لَمْ يَذْبَحْ حَتَّى صَلَّيْنَا فَلْيَذْبَحْ عَلَى اسْمِ اللهِ»  

"The Messenger of Allah stood up on the Day of Sacrifice and Said: 'Whoever turn toward our Qiblah and prays as we pray and offers the same sacrifice as we do, let him not offer his sacrifice until he has prayed; My maternal uncle stood up and said: 'O Messenger of Allah, I hastened to slaughter my sacrifice, so that I could feed my family,. And the members of my household,; or my family and my neighbors,; The Messenger of Allah said; 'Offer another sacrifice,; He said: 'I have a suckling she-goat kid that is dearer to me than two sheep raised for meat,' He said: 'Sacrifice it, for it is the better of your two sacrifices. But no Jadh'ah will do as a sacrifice for anyone after you."' (Sahih ) (Using translation from Nasāʾī 4394)  

قَامَ رَسُولُ اللهِ ﷺ يَوْمَ الْأَضْحَى فَقَالَ «مَنْ وَجَّهَ قِبْلَتَنَا وَصَلَّى صَلَاتَنَا وَنَسَكَ نُسُكَنَا فَلَا يَذْبَحْ حَتَّى يُصَلِّيَ» فَقَامَ خَالِي فَقَالَ يَا رَسُولَ اللهِ إِنِّي عَجَّلْتُ نُسُكِي لِأُطْعِمَ أَهْلِي وَأَهْلَ دَارِي أَوْ أَهْلِي وَجِيرَانِي فَقَالَ رَسُولُ اللهِ ﷺ أَعِدْ ذَبْحًا آخَرَ قَالَ فَإِنَّ عِنْدِي عَنَاقَ لَبَنٍ هِيَ أَحَبُّ إِلَيَّ مِنْ شَاتَيْ لَحْمٍ قَالَ اذْبَحْهَا فَإِنَّهَا خَيْرُ نَسِيكَتَيْكَ وَلَا تَقْضِي جَذَعَةً عَنْ أَحَدٍ بَعْدَكَ  

The Messenger of Allah ﷺ delivered a sermon to us on the day of sacrifice after the prayer. He said: If anyone prays like our prayer, and sacrifices like our sacrifice, his sacrifice is all right. If anyone sacrifices before the prayer (for 'Id), that is goat meant for flesh. Abu Burdah b. Niyar stood up and said: Messenger of Allah, I swear by Allah, I sacrificed before I went for prayer. I thought it was the day of eating and drinking; so I made haste, and ate myself, and supplied flesh to my family and neighbors. The Messenger of Allah ﷺ said: That is a goat meant for eating flesh. He said: I have a kid (of less than a year) which is better than two goats meant for flesh. Will it be valid from me ? He said: Yes, but it will not be valid for anyone after you. (Using translation from Abū Dāʾūd 2800)  

خَطَبَنَا رَسُولُ اللهِ ﷺ يَوْمَ النَّحْرِ بَعْدَ الصَّلَاةِ ثُمَّ قَالَ «مَنْ صَلَّى صَلَاتَنَا وَنَسَكَ نُسُكَنَا فَقَدْ أَصَابَ النُّسُكَ وَمَنْ نَسَكَ قَبْلَ الصَّلَاةِ فَتِلْكَ شَاةُ لَحْمٍ» فَقَالَ أَبُو بُرْدَةَ يَا رَسُولَ اللهِ وَاللهِ لَقَدْ نَسَكْتُ قَبْلَ أَنْ أَخْرُجَ إِلَى الصَّلَاةِ وَعَرَفْتُ أَنَّ الْيَوْمَ يَوْمُ أَكْلٍ وَشُرْبٍ فَتَعَجَّلْتُ فَأَكَلْتُ وَأَطْعَمْتُ أَهْلِي وَجِيرَانِي فَقَالَ رَسُولُ اللهِ ﷺ «تِلْكَ شَاةُ لَحْمٍ» قَالَ فَإِنَّ عِنْدِي عَنَاقًا جَذَعَةً خَيْرٌ مِنْ شَاتَيْ لَحْمٍ فَهَلْ تُجْزِئُ عَنِّي؟ قَالَ «نَعَمْ وَلَنْ تُجْزِئَ عَنْ أَحَدٍ بَعْدَكَ»  

"The Messenger of Allah said on the Day of Sacrifice:' Whoever slaughtered his sacrifice before the prayer, let him repeat it.' A man stood up and said: 'O Messenger of Allah, this is a day when people want to eat meat.' He mentioned that his neighbors were poor and it was as if the Messenger of Allah believed him. He said: 'I have a Jadh'ah that is dearer to me than tow sheep for meat.; So he granted him a concession (allowing him to sacrifice it) but I do not know whether it applied to anyone else or not. Then he went toward two rams and sacrificed them." (Sahih ) (Using translation from Nasāʾī 4396)  

قَالَ رَسُولُ اللهِ ﷺ يَوْمَ النَّحْرِ «مَنْ كَانَ ذَبَحَ قَبْلَ الصَّلَاةِ» فَلْيُعِدْ فَقَامَ رَجُلٌ فَقَالَ يَا رَسُولَ اللهِ هَذَا يَوْمٌ يُشْتَهَى فِيهِ اللَّحْمُ فَذَكَرَ هَنَةً مِنْ جِيرَانِهِ كَأَنَّ رَسُولَ اللهِ ﷺ صَدَّقَهُ فَقَالَ عِنْدِي جَذَعَةٌ هِيَ أَحَبُّ إِلَيَّ مِنْ شَاتَيْ لَحْمٍ «فَرَخَّصَ لَهُ» فَلَا أَدْرِي أَبَلَغَتْ رُخْصَتُهُ مَنْ سِوَاهُ أَمْ لَا ثُمَّ انْكَفَأَ إِلَى كَبْشَيْنِ فَذَبَحَهُمَا