"The Messenger of Allah prohibited two fasts: Fasting the Day of Adha and the Day of Fitr."
Jami` at-Tirmidhi Book 8, Hadith 91
← Previous Hadith "I witnessed Umar bin Al-Khattab on the Day of Nahr beginning with the Salat before the Khutbah. Then he said: 'I heard the Messenger of Allah prohibit fasting on these two days. As for the Day of Fitr, then it is for you to take a break from your fasting, and a celebration for the Muslims. As for the Day of Adha, then eat from the flesh that you have sacrificed.'"

Jami` at-Tirmidhi Book 8, Hadith 90 Next Hadith → The Messenger of Allah said: "The Day of Arafah, the Day of Nahr, and the Days of Tashriq are Eid for us. The people of Islam, and they are days of eating and drinking,"

Jami` at-Tirmidhi Book 8, Hadith 92