وعن سهل بن سعد
قال: قال رسول الله صلى الله عليه وسلم: «من يضمن لي ما بين لحييه، وما بين رجليه أضمن له الجنة»
The Messenger of Allah (sallallahu alayhi wa sallam) said, “Whosoever gives me a guarantee to safeguard what is between his jaws and what is between his legs, I shall guarantee him Jannah.”.
Riyad as-Salihin 1513, Book 18, The Book of the Prohibited actions, Hadith 3. 1 min read