(30) باب الْوُضُوءِ مِنْ مَسِّ الذَّكَرِ
It was narrated that Busrah said:
"The Messenger of Allah (ﷺ) said: 'Whoever touches his private part, let him perform Wudu'.'"
Reference: Sunan an-Nasa'i 444
In-book reference: Book 4, Hadith 50
English translation: Vol. 1, Book 4, Hadith 445