The Messenger of Allah ﷺ used to wear the stone of his ring facing the inside of his palm.
حدثنا عبد الرزاق حدثنا عبد العزيز بن أبي رواد عن نافع
كان رسول الله ﷺ يضع فص خاتمه في بطن الكف
No references are available.
Its isnad is sahih, and it is an abridgment of 4677.