The Prophet ﷺ used to wear his ring on his right hand.
أن النبي ﷺ كان يلبس خاتمه في يمينه.
No references are available.
Reported by Abu Dawud (4226), Tirmidhi in Shamail (90), Nasai (5203), and Abu Shaykh in Akhlaq al-Nabi ﷺ (p. 110), and Ibn Hibban graded it sahih (5501), all of them through Sulayman bin Bilal, who said, Sharik bin Abdullah bin Abu Nimr narrated to us, from Ibrahim bin Abdullah bin Hunain, from his father, from Ali, who said, and then he related it. Its isnad is sahih.