(70) باب صَوْمِ النَّبِيِّ صلى الله عليه وسلم - بِأَبِي هُوَ وَأُمِّي - وَذِكْرِ اخْتِلاَفِ النَّاقِلِينَ لِلْخَبَرِ فِي ذَلِكَ
It was narrated from Hunaidah bin Khalid that his wife said:
"One of the wives of the Prophet said: "The Prophet used to fast on the day of 'Ashura, nine days of Dhul-Hijjiah and three days each month: The first Monday of the month, and two Thursday." (ES)
Reference (ES): Sunan an-Nasa'i 2372 (ES)
In-book reference (ES): Book 22, Hadith 283 (ES)
English translation (ES): Vol. 3, Book 22, Hadith 2374 (ES)