اثنتان تدخلان الجنة: من حفظ ما بين لحييه ورجليه دخل الجنة
صحيح [ … ] الخرائطي في مكارم الأخلاق” عن عائشة. الصحيحة
It is reported that the Messenger of Allah (peace and blessings of Allaah be upon him) said:
“Two things lead (a person) to Paradise. The one who will protect what is between the jaws and (what is between) the legs, will enter Paradise.”
This hadith was narrated by al-Kharaita in Makarimul-Ahlyak from the words of ‘Aisha, may Allah be pleased with her.
Sheikh al-Albani called the hadith authentic. See Saheeh al-Jami ‘as-sagyir (140), al-Silsilah al-sahiha (2/37).
What is between the jaws means the tongue, and what is between the legs means the genitals.
It is narrated from the words of Sahl ibn Sa’d, may Allah be pleased with him, that the Messenger of Allah (peace and blessings of Allaah be upon him) said: “To the one who will vouch for me for what is between his jaws  and between his legs, I will vouch for (that he shall enter) Paradise. ”. al-Bukhari (6474) and at-Tirmidhi (2408).