"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. (Using translation from Nasāʾī 5211)
«نَهَانِي رَسُولُ اللهِ ﷺ عَنِ الْخَاتَمِ فِي هَذِهِ أَوْ هَذِهِ يَعْنِي السَّبَّابَةَ وَالْوُسْطَى» اللَّفْظُ لِابْنِ الْمُثَنَّى