Sayyiduna Abu Rafi' (may Allah be pleased with him) narrates: The Messenger of Allah (peace and blessings be upon him) came to us while we had a cooked goat. He (peace and blessings be upon him) said: "O Abu Rafi'! Hand me the foreleg." I handed it and he (peace and blessings be upon him) ate it. Then he said: "Hand me the foreleg." I handed it and he (peace and blessings be upon him) ate it. Then he said: "Hand me the foreleg." I said: O Messenger of Allah! Does a goat have more than two forelegs? The Messenger of Allah (peace and blessings be upon him) said: "Had you remained silent, you would have kept finding forelegs for as long as I kept asking."
Hadith Referenceالمعجم الكبير للطبراني / باب الألف / 966