(83) باب كَيْفَ يَصُومُ ثَلاَثَةَ أَيَّامٍ مِنْ كُلِّ شَهْرٍ وَذِكْرِ اخْتِلاَفِ النَّاقِلِينَ لِلْخَبَرِ فِي ذَلِكَ .
It was narrated that Umm Salamah said:
"The Messenger of Allah used to enjoin fasting three days: The first Thursday, and Monday and Monday." (PT)
Reference (PT): Sunan an-Nasa'i 2419 (PT)
In-book reference (PT): Book 22, Hadith 330 (PT)
English translation (PT): Vol. 3, Book 22, Hadith 2421 (PT)