Narrated AbuHurayrah:

The Prophet ﷺ gave a decision on the basis of an oath and a single witness.

Abu Dawud said: Al-Rabi' bin Sulaiman al-Mu'adhdhin told me some additional words in this tradition: Al-Shafi'i told me from 'Abd al-'Aziz. I then mentioned it fo Suhail who said: Rabi'ah told me - and he is reliable in my opinion - that I told him this (tradition) and I do not remember it. 'Abd al-'Aziz said: Suhail suffered from some disease which caused him to lose a little of his intelligence, and he forgot some of his traditions. Thereafter Suhail would narrate traditions from Rabi'ah on the authority of his father.

حَدَّثَنَا أَحْمَدُ بْنُ أَبِي بَكْرٍ أَبُو مُصْعَبٍ الزُّهْرِيُّ، حَدَّثَنَا الدَّرَاوَرْدِيُّ، عَنْ رَبِيعَةَ بْنِ أَبِي عَبْدِ الرَّحْمَنِ، عَنْ سُهَيْلِ بْنِ أَبِي صَالِحٍ، عَنْ أَبِيهِ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ النَّبِيَّ ﷺ قَضَى بِالْيَمِينِ مَعَ الشَّاهِدِ . قَالَ أَبُو دَاوُدَ وَزَادَنِي الرَّبِيعُ بْنُ سُلَيْمَانَ الْمُؤَذِّنُ فِي هَذَا الْحَدِيثِ قَالَ أَخْبَرَنِي الشَّافِعِيُّ عَنْ عَبْدِ الْعَزِيزِ قَالَ فَذَكَرْتُ ذَلِكَ لِسُهَيْلٍ فَقَالَ أَخْبَرَنِي رَبِيعَةُ - وَهُوَ عِنْدِي ثِقَةٌ - أَنِّي حَدَّثْتُهُ إِيَّاهُ وَلاَ أَحْفَظُهُ . قَالَ عَبْدُ الْعَزِيزِ وَقَدْ كَانَ أَصَابَتْ سُهَيْلاً عِلَّةٌ أَذْهَبَتْ بَعْضَ عَقْلِهِ وَنَسِيَ بَعْضَ حَدِيثِهِ فَكَانَ سُهَيْلٌ بَعْدُ يُحَدِّثُهُ عَنْ رَبِيعَةَ عَنْهُ عَنْ أَبِيهِ .