الْخَاتَمِ فِي هَذِهِ وَهَذِهِ . يَعْنِي السَّبَّابَةَ وَالْوُسْطَى
It 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.