Chapter 28: The Book of Horses, Races and Shooting
It was narrated that Anas bin Malik said: "The Messenger of Allah raced with a Bedouin and (the latter) won. It was as if the Companions of the Messenger of Allah were upset by this, so he said: 'It is a right upon Allah that there is nothing that raises itself in this world except that He lowers it.'"
Sunan an-Nasa'i 3592