[Machine] The Messenger of Allah ﷺ said, "O Abu Dharr, if you fast three days every month, then fast on the thirteenth, fourteenth, and fifteenth." It was also narrated by others from Musa ibn Talhah from Ibn al-Hawtakiyyah from Abu Dharr, and it was said that it was narrated by Abu Musa from Abu Hurairah.
قَالَ رَسُولُ اللهِ ﷺ يَا أَبَا ذَرٍّ إِذَا صُمْتَ مِنَ الشَّهْرِ ثَلَاثَةَ أَيَّامٍ فَصُمْ ثَلَاثَ عَشْرَةَ وَأَرْبَعَ عَشْرَةَ وَخَمْسَ عَشْرَةَ وَرَوَاهُ غَيْرُهُ عَنْ مُوسَى بْنِ طَلْحَةَ عَنِ ابْنِ الْحَوْتَكِيَّةِ عَنْ أَبِي ذَرٍّ وَقِيلَ عَنْ أَبِي مُوسَى عَنْ أَبِي هُرَيْرَةَ