(70) باب صَوْمِ النَّبِيِّ صلى الله عليه وسلم - بِأَبِي هُوَ وَأُمِّي - وَذِكْرِ اخْتِلاَفِ النَّاقِلِينَ لِلْخَبَرِ فِي ذَلِكَ
It was narrated that 'Abdullah bin Masud said:
"The Messenger of Allah used to fast three days in the middle of every month, and he rarely did not fast on Friday." (AR)
Reference (AR): Sunan an-Nasa'i 2368 (AR)
In-book reference (AR): Book 22, Hadith 279 (AR)
English translation (AR): Vol. 3, Book 22, Hadith 2370 (AR)