1-12.
The Discourse on the Ganges River and so on
258-269.
"Just as, monks, the river Ganges slants towards the east, slopes towards the east, inclines towards the east;
so too, monks, a monk developing the seven factors of enlightenment, cultivating the seven factors of enlightenment, slants towards Nibbāna, slopes towards Nibbāna, inclines towards Nibbāna.
And how, monks, does a monk developing the seven factors of enlightenment, cultivating the seven factors of enlightenment, slant towards Nibbāna, slope towards Nibbāna, incline towards Nibbāna?
Here, monks, a monk develops the enlightenment factor of mindfulness, etc.
he develops the enlightenment factor of equanimity, based upon seclusion, based upon dispassion, based upon cessation, maturing in release, etc.
Thus, monks, a monk developing the seven factors of enlightenment, cultivating the seven factors of enlightenment, slants towards Nibbāna, slopes towards Nibbāna, inclines towards Nibbāna."