(23) باب حِفْظِ اللِّسَانِ
Narrated Sahl bin Sa`d:
Allah's Messenger (ﷺ) said, "Whoever can guarantee (the chastity of) what is between his two jaw-bones and what is between his two legs (i.e. his tongue and his private parts), I guarantee Paradise for him."
Reference: Sahih al-Bukhari 6474
In-book reference: Book 81, Hadith 63
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 8, Book 76, Hadith 481