It is narrated from Hazrat Abu Huraira (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) was asked about riding a sacrificial animal (when a person is going for Hajj and has no other means of transport). The Noble Prophet (peace and blessings be upon him) said to him, "Ride it." He submitted, "This is a sacrificial animal." The Noble Prophet (peace and blessings be upon him) again said, "Ride it."
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 10127