(70) باب صَوْمِ النَّبِيِّ صلى الله عليه وسلم - بِأَبِي هُوَ وَأُمِّي - وَذِكْرِ اخْتِلاَفِ النَّاقِلِينَ لِلْخَبَرِ فِي ذَلِكَ
It was narrated that Hafsah said:
"When the Messenger of Allah would lie down, he would place his right hand under his right cheek, and he used to fast on Mondays and Thursday." (FR)
Reference (FR): Sunan an-Nasa'i 2367 (FR)
In-book reference (FR): Book 22, Hadith 278 (FR)
English translation (FR): Vol. 3, Book 22, Hadith 2369 (FR)