سُنَنُ النَّسَائِيِّ
Sunan an-Nasa’i 2420
The Book of Fasting
How to Fast Three Days of Each Month, And Mentioning The Differences Reported by The Narrators In The Narration Regarding that
أَخْبَرَنَا مَخْلَدُ بْنُ الْحَسَنِ، قَالَ حَدَّثَنَا عُبَيْدُ اللَّهِ، عَنْ زَيْدِ بْنِ أَبِي أُنَيْسَةَ، عَنْ أَبِي إِسْحَاقَ، عَنْ جَرِيرِ بْنِ عَبْدِ اللَّهِ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ صِيَامُ ثَلاَثَةِ أَيَّامٍ مِنْ كُلِّ شَهْرٍ صِيَامُ الدَّهْرِ وَأَيَّامُ الْبِيضِ صَبِيحَةَ ثَلاَثَ عَشْرَةَ وَأَرْبَعَ عَشْرَةَ وَخَمْسَ عَشْرَةَ .
It was narrated from Jarir bin 'Abdullah that the Prophet (ﷺ) said: "Fasting three days of each month is fasting for a lifetime, and the shining days of Al-Bid, the thirteenth, fourteenth and fifteenth."
Sunan an-Nasa'i, 2420Sahih (Darussalam)