Musannaf Ibn Abi Shayba 3:3476

Ibn Numayr narrated to us, from Dawud ibn Qays, who said: Iyad ibn Abdullah ibn Abi Sarh narrated to me, from Abu Sa’id, who said: The Messenger of Allah (may Allah bless him and grant him peace) used to go out on the day of the Eid, the day of Fitr, and he would pray two rak'ahs with the people, then he would perform the taslim.