Yahya bin Abi Ishaq narrates: A man from Banu Ghifar told me in the gathering of Salim bin Abdullah that so-and-so narrated this hadith to him: "Once food, bread and meat, was brought to the Prophet (peace and blessings be upon him). He said: 'Hand me a foreleg.' A foreleg was handed to him, and he ate it. Yahya says: To my knowledge, he related it like this: Then he (peace and blessings be upon him) said: 'Hand me a foreleg.' Then a foreleg was handed to him, and he ate it. Then he said: 'Hand me a foreleg.' He said: 'O Messenger of Allah! There are only two forelegs.' The Prophet (peace and blessings be upon him) said: 'By your father! If you had remained silent, I would have kept being handed a foreleg from it for as long as I kept asking for it.'"
Ahmad recorded it, and its chain contains a narrator who is not named.