It is narrated from Sayyiduna Abu Rafi' (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Hand me the foreleg." I handed it to him. Then he said: "Hand me the foreleg." I handed it to him. Then he said: "Hand me the foreleg." I said: O Prophet of Allah! Does a goat have more than two forelegs? The Messenger of Allah (peace and blessings be upon him) said: "Had you kept handing them to me, you would have continued handing them to me."
Hadith Referenceالمعجم الكبير للطبراني / باب الألف / 960