(the slave of Ibn Azhar) I witnessed the ʿId with ʿUmar bin Al-Khattab who said, Messenger of Allah ﷺ has forbidden people to fast on the day on which you break fasting (the fasts of Ramadan) and the day on which you eat the meat of your sacrifices (the first day of ʿId ul Fitr and ʿId ul-Adha).  

شَهِدْتُ الْعِيدَ مَعَ عُمَرَ بْنِ الْخَطَّابِ ؓ فَقَالَ: هَذَانِ يَوْمَانِ نَهَى رَسُولُ اللَّهِ ﷺ عَنْ صِيَامِهِمَا يَوْمُ فِطْرِكُمْ مِنْ صِيَامِكُمْ وَالْيَوْمُ الآخَرُ تَأْكُلُونَ فِيهِ مِنْ نُسُكِكُمْ۔  

The Prophet ﷺ forbade the fasting of ʿId-ul-Fitr and ʿId-ul-Adha (two feast days) and also the wearing of As-Samma' (a single garment covering the whole body), and sitting with one's leg drawn up while being wrapped in one garment. He also forbade the prayers after the Fajr (morning) and the ʿAsr (afternoon) prayers.  

نَهَى النَّبِيُّ ﷺ عَنْ صَوْمِ يَوْمِ الْفِطْرِ وَالنَّحْرِ وَعَنِ الصَّمَّاءِ وَأَنْ يَحْتَبِيَ الرَّجُلُ فِي ثَوْبٍ وَاحِدٍ وَعَنْ صَلاَةٍ بَعْدَ الصُّبْحِ وَالْعَصْرِ