Sayyiduna Thawban (may Allah be pleased with him) narrates: The Messenger of Allah (peace and blessings be upon him) made unlawful: wearing a gold ring, qassi (silk) cloth, deeply dyed safflower-coloured garments, and leopard skins.
Hadith Referenceالمعجم الكبير للطبراني / باب الثاء / 1405