Musannaf Ibn Abi Shayba 3:3475

Ibn Idris narrated to us, from Shu'bah, from 'Adi ibn Thabit, from Sa'id ibn Jubayr, from Ibn 'Abbas, who said: The Messenger of Allah (may Allah bless him and grant him peace) went out on the day of Fitr or Adha, and he prayed two rak'ahs with the people. Then he departed, and he did not pray before them nor after them.