1.
The Discourse on Training
83.
"There are, monks, these five weaknesses in training.
Which five?
Killing living beings... etc.
spirits, liquor and intoxicants that cause negligence -
these, monks, are the five weaknesses in training.
"For the abandoning of these five weaknesses in training, monks, the four bases for spiritual power are to be developed. Which four? Here, monks, a monk develops the basis for spiritual power that possesses concentration due to desire and volitional activities of striving, concentration due to energy... concentration due to mind, He develops the basis for spiritual power that possesses concentration due to investigation and volitional activities of striving. For the abandoning of these five weaknesses in training, monks, these four bases for spiritual power are to be developed." The first.
84-91.