Sahih Bukhari Volume 8, Book 73, Hadith Number 180.

Narated By Anas : The Prophet saw a man driving a Badana (a camel for sacrifice) and said (to him). “Ride it.” The man said, “It is a Bandana.” The Prophet said, “Ride on it.” The man said, “It is a Bandana.” The Prophet said, Ride on it, woe to you!”