(29) باب الأَمْرِ بِالْوُضُوءِ مِنَ النَّوْمِ
Abu Hurairah said:
"The Messenger of Allah (ﷺ) said: 'When any one of you gets up after (sleeping) at night, let him not put his hand into the vessel until he has poured water on it two or three times, for none of you knows where his hand spent the night.'" (FR)
Reference (FR): Sunan an-Nasa'i 441 (FR)
In-book reference (FR): Book 4, Hadith 47 (FR)
English translation (FR): Vol. 1, Book 4, Hadith 442 (FR)