Yes I said to her: Which were (the particular) days of the month on which he observed fast? She said: He was not particular about the days of the month on which to observe fast.  

أَنَّهَا سَأَلَتْ عَائِشَةَ زَوْجَ النَّبِيِّ ﷺ أَكَانَ رَسُولُ اللَّهِ ﷺ يَصُومُ مِنْ كُلِّ شَهْرٍ ثَلاَثَةَ أَيَّامٍ قَالَتْ نَعَمْ فَقُلْتُ لَهَا مِنْ أَىِّ أَيَّامِ الشَّهْرِ كَانَ يَصُومُ قَالَتْ لَمْ يَكُنْ يُبَالِي مِنْ أَىِّ أَيَّامِ الشَّهْرِ يَصُومُ  

"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.'"  

قُلْتُ لِعَائِشَةَ أَكَانَ رَسُولُ اللَّهِ ﷺ يَصُومُ ثَلاَثَةَ أَيَّامٍ مِنْ كُلِّ شَهْرٍ قَالَتْ نَعَمْ قُلْتُ مِنْ أَيِّهِ كَانَ يَصُومُ قَالَتْ كَانَ لاَ يُبَالِي مِنْ أَيِّهِ صَامَ  

“The Messenger of Allah ﷺ used to fast three days of each month.” I said: “Which were they?” She said: “He did not care which days they were.”  

أَنَّهَا قَالَتْ كَانَ رَسُولُ اللَّهِ ﷺ يَصُومُ ثَلاَثَةَ أَيَّامٍ مِنْ كُلِّ شَهْرٍ قُلْتُ مِنْ أَيِّهِ؟ قَالَتْ لَمْ يَكُنْ يُبَالِي مِنْ أَيِّهِ كَانَ  

“The Messenger of Allah ﷺ used to fast three days of each month.” I said: “Which were they?” She said: “He did not care which days they were.” (Using translation from Ibn Mājah 1709)  

أَنَّهَا قَالَتْ كَانَ رَسُولُ اللهِ ﷺ يَصُومُ ثَلَاثَةَ أَيَّامٍ مِنْ كُلِّ شَهْرٍ قَالَتْ فَقُلْتُ مِنْ أَيِّهِ؟ فَقَالَتْ لَمْ يَكُنْ يُبَالِي مِنْ أَيِّهِ كَانَ  

"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  

“The Messenger of Allah ﷺ used to fast three days of each month.” I said: “Which were they?” She said: “He did not care which days they were.” (Using translation from Ibn Mājah 1709)  

«كَانَ رَسُولُ اللَّهِ ﷺ يَصُومُ ثَلَاثَةَ أَيَّامٍ مِنْ كُلِّ شَهْرٍ» قُلْتُ مِنْ أَيِّهِ؟ قَالَتْ «لَمْ يَكُنْ يُبَالِي مِنْ أَيِّهِ كَانَ»  

I asked 'Aishah: Would the Messenger of Allah ﷺ fast three days every month ? She replied: Yes. I asked: Which days in the month he used to fast ? She replied: He did not care which days of the month he fasted. (Using translation from Abū Dāʾūd 2453)   

عَائِشَةَ ؓ أَكَانَ رَسُولُ اللهِ ﷺ يَصُومُ مِنْ كُلِّ شَهْرٍ ثَلَاثَةَ أَيَّامٍ؟ قَالَتْ نَعَمْ قُلْتُ مِنْ أِيِّ أَيَّامِ الشَّهْرِ كَانَ يَصُومُ؟ قَالَتْ مَا كَانَ يُبَالِي مِنْ أِيِّ الشَّهْرِ كَانَ يَصُومُ