Musnad Ahmad 31:286

Waki' narrated to us, Sufyan narrated to us, Abu Hashim al-Rummani narrated to us, from Isma'il ibn Riyah ibn 'Ubaydah, from his father, or from someone else, from Abu Sa'id al-Khudri, that the Prophet, peace and blessings of Allah be upon him, when he finished his food, would say: "Praise be to Allah who fed us and gave us drink, and made us Muslims."