ذِكْرُ الْبَيَانِ بِأَنَّ الْمَرْءَ مُبَاحٌ لَهُ أَنْ يَصُومَ هَذِهِ الْأَيَّامَ الثَّلَاثَ مِنْ أَيِّ الشَّهْرِ شَاءَ
"I heard Mu'adhah saying to Aishah: 'Did the Messenger of Allah fast three days of every month?' She replied in the affirmative. So she said: 'Which of them would he fast?' She said: 'Which of them he would fast was not noticeable.'" (Using translation from Tirmidhī 763)
قُلْتُ لِعَائِشَةَ «أَكَانَ النَّبِيُّ ﷺ يَصُومُ مِنَ الشَّهْرِ ثَلَاثَةَ أَيَّامٍ؟ » قَالَتْ نَعَمْ قُلْتُ «مِنْ أَيِّهِ؟ » قَالَتْ لَمْ يُبَالِ مِنْ أَيِّهِ صَامَ