حَدَّثَنَا سَهْلُ بْنُ أَبِي سَهْلٍ، حَدَّثَنَا سُفْيَانُ، عَنِ الزُّهْرِيِّ، عَنْ أَبِي عُبَيْدٍ، قَالَ شَهِدْتُ الْعِيدَ مَعَ عُمَرَ بْنِ الْخَطَّابِ فَبَدَأَ بِالصَّلاَةِ قَبْلَ الْخُطْبَةِ فَقَالَ إِنَّ رَسُولَ اللَّهِ ـ صلى الله عليه وسلم ـ نَهَى عَنْ صِيَامِ هَذَيْنِ الْيَوْمَيْنِ يَوْمِ الْفِطْرِ وَيَوْمِ الأَضْحَى أَمَّا يَوْمُ الْفِطْرِ فَيَوْمُ فِطْرِكُمْ مِنْ صِيَامِكُمْ وَيَوْمُ الأَضْحَى تَأْكُلُونَ فِيهِ مِنْ لَحْمِ نُسُكِكُمْ ‏.‏

It wasnarrated that Abu ‘Ubaid said: “I was present for ‘Eid with‘Umar bin Khattab. He started with the prayer before the sermon,andsaid: ‘The Messenger of Allah (PBUH) forbade fasting on thesetwo days,the Day of Fitr and the Day of Adha. As for the Day ofFitr, it is theday when you break your fast, and on the Day of Adhayou eat the meatof your sacrifices.’” Translation Not Available

Book Ref: Sunan Ibn Majah Book 7 Hadith 1722
Web Ref:  Sunan Ibn Majah Vol 1 Book 7 Hadith 1722