4.
The Discourse on the Unwise
225.
Then a certain monk approached the Blessed One, etc.
Seated to one side, that monk said this to the Blessed One -
"'Unwise, an idiot, unwise, an idiot', venerable sir, is said.
In what way, venerable sir, is one called 'unwise, an idiot'?"
"Because of undevelopment and lack of cultivation of the seven factors of enlightenment, monk, one is called 'unwise, an idiot'.
Which seven?
The enlightenment factor of mindfulness, etc.
the enlightenment factor of equanimity -
Because of undevelopment and lack of cultivation of these seven factors of enlightenment, monk, one is called 'unwise, an idiot'."
The fourth.