10.
The Discourse on Unmindfulness
210.
"Monks, there are these five dangers for one who is unmindful and not fully aware when falling asleep.
Which five?
One sleeps unpleasantly, one wakes up unpleasantly, one sees evil dreams, deities do not protect one, one emits semen.
These, monks, are the five dangers for one who is unmindful and not fully aware when falling asleep.
"Monks, there are these five benefits for one who is mindful and fully aware when falling asleep. Which five? One sleeps pleasantly, one wakes up pleasantly, one does not see evil dreams, deities protect one, one does not emit semen. These, monks, are the five benefits for one who is mindful and fully aware when falling asleep." The tenth.