ONE HADITH A DAY
Jami' at-Tirmidhi no. 763
“Yazid Ar-Rishk said:"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”