(22) باب الْوُضُوءِ مَرَّةً مَرَّةً
Narrated Ibn `Abbas:
The Prophet (ﷺ) performed ablution by washing the body parts only once.
Reference: Sahih al-Bukhari 157
In-book reference: Book 4, Hadith 23
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 1, Book 4, Hadith 159