Musnad Ahmad 30:3575

Ad-Dahhak narrated to us, Ibn ‘Ajlan narrated to us, from his father, from Abu Hurairah, that a sheep was cooked. The Messenger of Allah (peace and blessings of Allah be upon him) said: "Give me the foreleg." So he handed it to him. Then he said: "Give me the foreleg." So he handed it to him. Then he said: "Give me the foreleg." He said: "O Messenger of Allah, the sheep only has two forelegs." He said: "Had you sought it, you would have found it."