Musannaf Ibn Abi Shayba 3:3300

Waki’ narrated to us, from Sufyan, from Ibn Jurayj, from al-Hasan ibn Muslim, from Tawus, from Ibn Abbas, who said: I witnessed the Eid with the Prophet, may Allah bless him and grant him peace, and with Abu Bakr and Umar, and they began with the prayer before the sermon. He said: Then I witnessed the Eid with Uthman, and he began with the prayer before the sermon. He said: And I witnessed it with Ali, and he began with the prayer before the sermon.