I saw ʿAli ؓ and ‘Uthman ؓ praying on the day of al-Fitr and the day of al-Adha, then they reminded the people. And I heard them say: The Messenger of Allah ﷺ forbade fasting on these two days. And I heard ‘Ali ؓ say: The Messenger of Allah ﷺ forbade anything of the sacrificial meat to be left after three days.
وَسَمِعْتُهُمَا يَقُولانِ إِنَّ رَسُولَ اللهِ ﷺ نَهَى عَنْ صِيَامِ هَذَيْنِ الْيَوْمَيْنِ قَالَ وسَمِعْتُ عَلِيًّا يَقُولُ نَهَى رَسُولُ اللهِ ﷺ أَنْ يَبْقَى مِنْ نُسُكِكُمْعِنْدَكُمْ شَيْءٌ بَعْدَ ثَلاثٍ