The Messenger of Allah ﷺ said, "Whoever guarantees for me what is between his jaws and what is between his legs, I will guarantee him Paradise."
عن رسول الله ﷺ قال: من يضمن لي ما بين لحييه وما بين رجليه، أضمن له الجنة.
Bukhari reported it in Riqaq (6474) from Muhammad bin Abu Bakr Muqaddami, who said, Umar bin Ali narrated to us, who heard Abu Hazim, from Sahl bin Saad, and he related it.