al-Mughira bin 'Abdur Rahman المغيرة بن عبد الرحمن بن الحارث · The Book of Adornment

"The Messenger of Allah said to me: 'Say: O Allah, guide me and make me steadfast,' and he forbade me to put a ring on this one and this one" - and Bishr (one of the narrators) pointed to his forefinger and middle finger. And 'Asim said: "One of the two of them."