In the name of Allah, Most Gracious, Most Merciful.
Narrated Sahl ibn Saad (may Allah be pleased with him): ‘Allah’s Messenger (May Allah exalt his mention and protect him from imperfection) said: “Whoever can guarantee (the chastity of) what is between his two jawbones (i.e. his mouth and tongue) and what is between his two legs (i.e. his private parts), I guarantee Paradise for him.” (Bukhari)
Riyaadiss-Saliheen (The Meadows of the Righteous) (Abridged)
By Imam An Nawawi Vol. (2)
Publisher: Dar Al-Manarah
Chapiter 236, Page 961, Number 813