Sunan an-Nasa'i 5211
سنن النسائي#5211SahihIt was narrated that 'Ali said:"The Messenger of Allah [SAW] forbade me to wear a ring on this one and this one," meaning the forefinger and middle finger. And this is the wording of Ibn Al-Muthanna
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih
In-book reference: 48:172