[Machine] Abu Dharr said that the Messenger of Allah ﷺ instructed him to fast the white days, which are the thirteenth, fourteenth, and fifteenth of each month.
أَبُو ذَرٍّ أَنَا أَمَرَهُرَسُولُ اللهِ ﷺ بِصِيَامِ الْبِيضِ الْغُرِّ ثَلَاثَ عَشْرَةَ وَأَرْبَعَ عَشْرَةَ وَخَمْسَ عَشْرَةَ