Musannaf Ibn Abi Shayba 16:286

Abu Bakr narrated to us, he said: Fudayl ibn 'Iyad narrated to us, from 'Abd al-'Aziz ibn Rufay', from Mujahid, who said: The Messenger of Allah (may Allah bless him and grant him peace) did not eat while reclining except once, then he withdrew and said: "O Allah, I am Your servant and Your Messenger."