The days of Tashriq are the days of eating and drinking.
Sahih Muslim Book 13, Hadith 183
← Previous Hadith 'A'isha (Allah be pleased with her) said that the Prophet (ﷺ) forbade to observe fast on two days-the day of Fitr and the day of Adha.

Sahih Muslim Book 13, Hadith 182 Next Hadith → I met Abu Malih and asked him and he narrated it to me from the Messenger of Allah (ﷺ). a hadith like one (narrated above) with this addition:" And remembrance of Allah"

Sahih Muslim Book 13, Hadith 184