Musnad Abu Ya'la al-Mawsili 147:12

Abu al-Rabi' narrated to us, Hammad narrated to us, Ayyub narrated to us, he said: I saw Anas bin Malik and al-Hasan praying on the day of Eid before the Imam came out. He said: And I saw Muhammad bin Sirin come and sit, and he did not pray.