Sahih Muslim , Book 22, Hadith 4851 (USC-MSA) ⓘ
Abu 'Ubaid, the freed slave of Ibn Azhar, reported that he said 'Id (prayer) with Umar b. al-Khattab, and then said the 'Id (prayer) with 'Ali b. Abu Talib. He (the narrator further) reported: He led us in prayer before delivering the sermon and then addressed the people saying: Allah's Messenger has forbidden you to eat the flesh of your sacrificial animals beyond three nights, so do not eat that.
حَدَّثَنِي حَرْمَلَةُ بْنُ يَحْيَى، أَخْبَرَنَا ابْنُ وَهْبٍ، حَدَّثَنِي يُونُسُ، عَنِ ابْنِ شِهَابٍ، حَدَّثَنِي أَبُو عُبَيْدٍ، مَوْلَى ابْنِ أَزْهَرَ أَنَّهُ شَهِدَ الْعِيدَ مَعَ عُمَرَ بْنِ الْخَطَّابِ قَالَ ثُمَّ صَلَّيْتُ مَعَ عَلِيِّ بْنِ أَبِي طَالِبٍ - قَالَ - فَصَلَّى لَنَا قَبْلَ الْخُطْبَةِ ثُمَّ خَطَبَ النَّاسَ فَقَالَ إِنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَدْ نَهَاكُمْ أَنْ تَأْكُلُوا لُحُومَ نُسُكِكُمْ فَوْقَ ثَلاَثِ لَيَالٍ فَلاَ تَأْكُلُوا .
also referenced under: Book 35, Hadith 35 (In-Book) & Hadith 1969 (Reference)