Sahih Bukhari Volume 2, Book 26, Hadith Number 749.

Narated By Anas : The Prophet saw a man driving a Badana. He said, “Ride on it.” The man replied, “It is a Badana.” The Prophet said (again), “Ride on it.” He (the man) said, “It is a Badana.” The Prophet said thrice, “Ride on it.”