Musannaf Ibn Abi Shayba 21:449

Muhammad ibn Bishr narrated to us, from Mis'ar, from Hilal, from 'Urwah, that when food was placed before him, he would say: "Glory be to You, how excellent is that with which You test us. Glory be to You, how excellent is that which You give us, our Lord and the Lord of our first forefathers." Then he would mention the name of Allah and place his hand [to eat].