Sunan An-Nasa'i - سنن النسائي
22. The Book of Fasting - كتاب الصيام
84) Chapter: Mentioning The Differences Reported From Musa Bin Talhah In The Narration About Fasting three days of each month
It was narrated from Abu Dharr that the Prophet said to a man:
"You should fast the thirteenth, fourteenth and fifteenth." (Hasan)
Abu 'Abdur-Rahman (An-Nasai) said: This is a mistake, it is not a narration of Bayan; perhaps Sufyan said: "It was narrated to us by two (Ithnan)" and the 'Alif was dropped so it became Bayan.
84) باب ذِكْرِ الاِخْتِلاَفِ عَلَى مُوسَى بْنِ طَلْحَةَ فِي الْخَبَرِ فِي صِيَامِ ثَلاَثَةِ أَيَّامٍ مِنَ الشَّهْرِ
أَخْبَرَنَا مُحَمَّدُ بْنُ مَنْصُورٍ، عَنْ سُفْيَانَ، عَنْ بَيَانِ بْنِ بِشْرٍ، عَنْ مُوسَى بْنِ طَلْحَةَ، عَنِ ابْنِ الْحَوْتَكِيَّةِ، عَنْ أَبِي ذَرٍّ، أَنَّ النَّبِيَّ صلى الله عليه وسلم قَالَ لِرَجُلٍ . قَالَ أَبُو عَبْدِ الرَّحْمَنِ هَذَا خَطَأٌ لَيْسَ مِنْ حَدِيثِ بَيَانٍ وَلَعَلَّ سُفْيَانَ قَالَ حَدَّثَنَا اثْنَانِ فَسَقَطَ الأَلِفُ فَصَارَ بَيَانٌ . " عَلَيْكَ بِصِيَامِ ثَلاَثَ عَشْرَةَ وَأَرْبَعَ عَشْرَةَ وَخَمْسَ عَشْرَةَ "