Sahih Muslim
Sahih Muslim 1141 a
The prohibition of fasting the days of At-Tashriq, which are the days of eating, drinking and remembering Allah, The Mighty and Sublime
Arabic hadith text
وَحَدَّثَنَا سُرَيْجُ بْنُ يُونُسَ، حَدَّثَنَا هُشَيْمٌ، أَخْبَرَنَا خَالِدٌ، عَنْ أَبِي الْمَلِيحِ، عَنْ نُبَيْشَةَ، الْهُذَلِيِّ قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم "أَيَّامُ التَّشْرِيقِ أَيَّامُ أَكْلٍ وَشُرْبٍ " .
Translation
Nubaisha al-Hudhali reported Allah's Messenger (ﷺ) as saying
The days of Tashriq are the days of eating and drinking.