Narrated Sahl bin Sa'd: The Prophet said, "Whoever guarantees me what is between his legs (i.e. his private parts), and what is between his jaws (i.e., his tongue), I guarantee him Paradise."
Narrated Abu Huraira: The Prophet said, "The boy is for (the owner of) the bed and the stone is for the person who commits illegal sexual intercourse.'
Volume 4, Book 54, Number 516:
Narrated Abu Huraira:
The Prophet said, "If anyone of you rouses from sleep and performs the ablution, he should wash his nose by putting water in it and then blowing it out thrice, because Satan has stayed in the upper part of his nose all the night."