Hadith
أَخْبَرَنَا عُبَيْدُ اللَّهِ بْنُ سَعِيدٍ، قَالَ حَدَّثَنَا يَحْيَى، عَنْ سَعْدِ بْنِ إِسْحَاقَ، قَالَ حَدَّثَتْنِي زَيْنَبُ، عَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم نَهَى عَنْ لُحُومِ الأَضَاحِي فَوْقَ ثَلاَثَةِ أَيَّامٍ فَقَدِمَ قَتَادَةُ بْنُ النُّعْمَانِ - وَكَانَ أَخَا أَبِي سَعِيدٍ لأُمِّهِ وَكَانَ بَدْرِيًّا - فَقَدَّمُوا إِلَيْهِ فَقَالَ أَلَيْسَ قَدْ نَهَى عَنْهُ رَسُولُ اللَّهِ صلى الله عليه وسلم قَالَ أَبُو سَعِيدٍ إِنَّهُ قَدْ حَدَثَ فِيهِ أَمْرٌ إِنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم نَهَانَا أَنْ نَأْكُلَهُ فَوْقَ ثَلاَثَةِ أَيَّامٍ ثُمَّ رَخَّصَ لَنَا أَنْ نَأْكُلَهُ وَنَدَّخِرَهُ .
It was narrated from Abu Sa'eed Al-Khudri that:the Messenger of Alllah forbade (Eating) the meat of sacrificial animals after three days. Then Qatadh bin An-Nu' man, who was brother of Abu Sa'eed through his mo0ther, and had been present at Badr, came and they offered him (some of the meat) .He said: "Didn't the Messenger of Allah forbid it?" Abu Sa eed said: "Something happened later. The Messenger of Allah forbade us to eat it for more than three days, then he allowed us to eat it and store it." (Sahih)
Sahih · Abu Ghuddah
Sunan an-Nasa'i 4428 ·Book 43, Hadith 68·Also available on sunnah.com·