It is narrated from Sayyiduna Ali (may Allah be pleased with him) that once a mule was presented to the Prophet (peace and blessings be upon him) as a gift. The Prophet (peace and blessings be upon him) rode it. A companion (may Allah be pleased with him) asked: If we also wish to obtain such an animal? The Prophet (peace and blessings be upon him) said: "Do you want to crossbreed donkeys with horses? This is done by those who are ignorant."