1-12.
The Twelve Discourses Beginning with the Eastern
541-552.
"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 five faculties, cultivating the five faculties, slants towards Nibbāna, slopes towards Nibbāna, inclines towards Nibbāna.
And how, monks, does a monk developing the five faculties, cultivating the five faculties, slant towards Nibbāna, slope towards Nibbāna, incline towards Nibbāna?
Here, monks, a monk develops the faith faculty, based upon seclusion, based upon dispassion, based upon cessation, maturing in release; the energy faculty, etc.
the mindfulness faculty...
the concentration faculty...
he develops the wisdom faculty, based upon seclusion, based upon dispassion, based upon cessation, maturing in release.
Thus, monks, a monk developing the five faculties, cultivating the five faculties, slants towards Nibbāna, slopes towards Nibbāna, inclines towards Nibbāna."
The twelfth.