3.
The Discourse on Mental Corruptions
163.
"There are these three mental corruptions, monks.
Which three?
Mental corruption of sensuality, mental corruption of existence, mental corruption of ignorance -
these, monks, are the three mental corruptions.
For the direct knowledge, full understanding, utter elimination, and abandoning of these three mental corruptions, monks, etc.
this noble eightfold path is to be developed."
The third.