The Book of Pilgrimage (Kitab Al-Hajj)
Muslim :: Book 7 : Hadith 3048
Hammam b. Munabbih reported: It is one out of these (narrations) that Abu Huraira (Allah be pleased with him) narrated to us from Muhammad the Messenger of Allah (may peace be upon him), and he narrated to us traditions out of which is that he said: When there was a person who was driving a garlanded sacrificial camel, Allah's Messenger (may peace be upon him) said to him: Woe to you; ride on it. He said: Messenger of Allah, it is a sacrificial animal, whereupon Allah's Messenger (may peace be upon him) said: Woe to you, ride on it; woe to you, ride on it.