It is narrated from Hazrat Abu Huraira (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: Once he saw a man who was driving a camel. The Noble Prophet (peace and blessings be upon him) said to him, "Ride on it." He replied, "It is a sacrificial animal." The Noble Prophet (peace and blessings be upon him) again said, "Ride on it." He again replied, "It is a sacrificial animal." And the Noble Prophet (peace and blessings be upon him) again ordered him to ride on it.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 10315