Sayyiduna Abu Hurayrah (may Allah be pleased with him) says that the Messenger of Allah (peace and blessings be upon him) saw a man driving a sacrificial camel. He (peace and blessings be upon him) said: "Ride it." He said: O Messenger of Allah, it is a sacrificial animal. He (peace and blessings be upon him) said: "Woe to you, ride it!" The Messenger of Allah (peace and blessings be upon him) said this the second or the third time.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 10204