Musannaf Ibn Abi Shayba 13:2027

Abu Bakr narrated to us, he said: Abu Mu'awiyah narrated to us, from al-A'mash, from Abu Hazim, from Abu Hurayrah, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "If a foreleg were gifted to me, I would accept it. And if I were invited to a trotter, I would answer."