It wasnarrated that Ibn 'Abbas said:
"The Messenger of Allah (ﷺ)usedto have a bath on the day of Fitr and the day of Adha." (RU)
English reference (RU): Vol. 1, Book 5, Hadith 1315 (RU)
Arabic reference (RU): Book 5, Hadith 1376 (RU)