Sahl bin Mu'adh bin Anas narrates from his father (may Allah be pleased with him), who was one of the Companions of the Prophet (peace and blessings be upon him), that the Prophet (peace and blessings be upon him) said: "Ride these animals while they are sound, and return them sound, and do not make them into thrones or chairs."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 10336