It wasnarrated from Abu Hurairah that the Messenger of Allah (ﷺ)said:
"Al-Fitr is the day when you break your fast and Al-Adha is thedaywhen you offer sacrifices." (RU)
English reference (RU): Vol. 1, Book 7, Hadith 1660 (RU)
Arabic reference (RU): Book 7, Hadith 1729 (RU)