The Book of Fasting
22/83. Chapter:
How to Fast Three Days of Each Month, And Mentioning The Differences Reported by The Narrators In The Narration Regarding that
Sunan an-Nasai
أَخْبَرَنَا عَلِيُّ بْنُ مُحَمَّدِ بْنِ عَلِيٍّ، قَالَ حَدَّثَنَا خَلَفُ بْنُ تَمِيمٍ، عَنْ زُهَيْرٍ، عَنِ الْحُرِّ بْنِ الصَّيَّاحِ، قَالَ سَمِعْتُ هُنَيْدَةَ الْخُزَاعِيَّ، قَالَ دَخَلْتُ عَلَى أُمِّ الْمُؤْمِنِينَ سَمِعْتُهَا تَقُولُ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم يَصُومُ مِنْ كُلِّ شَهْرٍ ثَلاَثَةَ أَيَّامٍ أَوَّلَ اثْنَيْنِ مِنَ الشَّهْرِ ثُمَّ الْخَمِيسَ ثُمَّ الْخَمِيسَ الَّذِي يَلِيهِ .
Hunaidah Al-Khuza'i said: "I entered upon the Mother of the Believers and heard her say: 'The Messenger of Allah used to fast three days of each month: The first Monday of the month, then Thursday, then the following Thursday."
Reference : Sunan an-Nasa'i 2415In-book reference : Book 22, Hadith 326English translation : Vol. 3, Book 22, Hadith 2417