Musannaf Ibn Abi Shayba 28:1034

Waki' narrated to us, he said: Ibn Abi Dhi'b narrated to us, from Nafi' ibn Abi Nafi', the freed slave of Abu Ahmad, from Abu Hurayrah, who said: The Messenger of Allah (may Allah bless him and grant him peace) said: "There is no prize for a race except in a hoof, or a hoofed animal, or an arrowhead."