Sunan an-Nasa'i, Hadith 5286 ⓘ
It was narrated that Abu Burdah said: "I heard 'Ali say: 'The Prophet of Allah [SAW] forbade me to wear a ring on the forefinger and middle finger.'"
أَخْبَرَنَا مُحَمَّدُ بْنُ بَشَّارٍ، قَالَ حَدَّثَنَا مُحَمَّدٌ، قَالَ حَدَّثَنَا شُعْبَةُ، عَنْ عَاصِمِ بْنِ كُلَيْبٍ، عَنْ أَبِي بُرْدَةَ، قَالَ سَمِعْتُ عَلِيًّا، يَقُولُ نَهَانِي نَبِيُّ اللَّهِ صلى الله عليه وسلم عَنِ الْخَاتَمِ فِي السَّبَّابَةِ وَالْوُسْطَى .
also referenced under: Book 48, Hadith 247 (In-Book) & Volume 6, Book 48, Hadith 5288 (DarusSalam)