Sunan an-Nasa'i, Volume 3, Book 24, Hadith 3007 (DarusSalam) ⓘ
It was narrated from Uqbah bin Amir that the Messenger of Allah said: "The day of Arafat and the day of sacrifice and the day of At-Tashriq are our Id, the people of Islam, and they are days of eating and drinking."
أَخْبَرَنِي عُبَيْدُ اللَّهِ بْنُ فَضَالَةَ بْنِ إِبْرَاهِيمَ، قَالَ أَنْبَأَنَا عَبْدُ اللَّهِ، - وَهُوَ ابْنُ يَزِيدَ الْمُقْرِئُ - قَالَ حَدَّثَنَا مُوسَى بْنُ عُلَىٍّ، قَالَ سَمِعْتُ أَبِي يُحَدِّثُ، عَنْ عُقْبَةَ بْنِ عَامِرٍ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " إِنَّ يَوْمَ عَرَفَةَ وَيَوْمَ النَّحْرِ وَأَيَّامَ التَّشْرِيقِ عِيدُنَا أَهْلَ الإِسْلاَمِ وَهِيَ أَيَّامُ أَكْلٍ وَشُرْبٍ " .
also referenced under: Hadith 3004 (Reference) & Book 24, Hadith 0 (In-Book)