Abu Ubayd (RA) the freedman of Abdur Rahman ibn Awf said that he saw Umar ibn al-Khattab (RA) begin with salah on the day of sacrifice before the sermon. He said, “I heard Allahs Messenger (SAW) disallow fasting on these two days. As for the Fed ul-Fitr, it is your breakfast after your fasts, and an eid for Muslims. And, as for the day of sacrifice (adha), eat the flesh of your sacrifice”.
[Ahmed224, Bukhari 1990, Muslim 1137, Abu Dawud 2416, Ibn e Majah 1722]