Sunan an-Nasai 19957
In-book no 5221أَخْبَرَنَا إِسْمَاعِيلُ بْنُ مَسْعُودٍ، قَالَ حَدَّثَنَا بِشْرٌ، قَالَ حَدَّثَنَا عَاصِمُ بْنُ كُلَيْبٍ، عَنْ أَبِي بُرْدَةَ، عَنْ عَلِيٍّ، قَالَ قَالَ لِي رَسُولُ اللَّهِ صلى الله عليه وسلم " قُلِ اللَّهُمَّ اهْدِنِي وَسَدِّدْنِي " . وَنَهَانِي أَنْ أَضَعَ الْخَاتَمَ فِي هَذِهِ وَهَذِهِ وَأَشَارَ بِشْرٌ بِالسَّبَّابَةِ وَالْوُسْطَى . قَالَ وَقَالَ عَاصِمٌ أَحَدُهُمَا .
It was narrated that 'Ali said: "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."