Sayyiduna Ja'dah bin Hubayrah (may Allah be pleased with him) said: The Messenger of Allah (peace and blessings be upon him) forbade me from three things: wearing a gold ring, wearing silk (qassi) garments, and using the mithrah (a silk saddle cover).
Hadith Referenceالمعجم الكبير للطبراني / باب الجيم / 2176