Musnad Ahmad 32:1340

Abdullah ibn Numayr narrated to us, Sa’d—meaning Ibn Sa’id—informed us, he said: Anas ibn Malik informed me, he said: Abu Talha sent me to the Messenger of Allah, may Allah bless him and grant him peace, to invite him, and he had prepared food for him. I approached, and the Messenger of Allah, may Allah bless him and grant him peace, was with the people. He looked at me, and I felt shy, so I said: "Answer Abu Talha." He said to the people: "Stand up." Abu Talha said: "O Messenger of Allah, I only prepared something for you." He said: The Messenger of Allah, may Allah bless him and grant him peace, touched it and invoked blessing upon it. Then he said: "Bring in a group of my companions, ten." He said: "Eat." They ate until they were full and went out. He said: "Bring in ten." They ate until they were full. He continued to bring in ten and have ten go out, until there was no one left among them who had not entered and eaten until he was full. Then he prepared it, and it was as it was when they ate from it.