FAST AT ANY TIME DURING THE MONTH H 1287 "I (Mu'azah Adawiah asked Lady Ayesha, wife of the Prophet, may Allah be pleased with her, Mother of Believers), 'Did the Messenger of Allah, praise and peace be upon him, fast on three days each month?' She replied, 'Yes.' I asked her, 'During which part of the month did he fast?' She answered, 'He did not mind which part it was.'" R 1287 Muslim with a chain up to Mu'azah Adawiah who related this.
1261- وعن مُعاذة العدوية : أنها سألت عائشةَ رَضِيَ اللهُ عنها : أكَانَ رسول الله صلى الله عليه وآله وسلم يَصُومُ مِنْ كُلِّ شَهْرٍ ثَلاَثة أيَّامٍ ؟ قالت : نَعَمْ . فقلتُ : مِنْ أيِّ الشَّهْرِ كَانَ يَصُومُ ؟ قالت : لَمْ يَكُنْ يُبَالِي مِنْ أيِّ الشَّهْرِ يَصُومُ . رواه مسلم .