Musnad Ahmad 33:984

'Abdah ibn Sulayman narrated to us, 'Abd al-Malik narrated to us, from 'Ata', from Jabir, who said: "I heard the Messenger of Allah, peace and blessings of Allah be upon him, on the day of Eid, begin with the prayer before the sermon, without an Adhan and without an Iqamah."