[246] "And how, bhikkhus, does a bhikkhu who is heedful (appamatta) develop the noble eightfold path (ariya aṭṭhaṅgika magga) and cultivate the noble eightfold path? Here, bhikkhus, a bhikkhu develops right view (sammādiṭṭhi) based on seclusion (viveka), based on dispassion (virāga), based on cessation, maturing in relinquishment (vossaggapariṇāmi) … he develops right concentration (sammāsamādhi) based on seclusion, based on dispassion, based on cessation, maturing in relinquishment. It is in this way, bhikkhus, that a bhikkhu who is heedful develops the noble eightfold path and cultivates the noble eightfold path."
(The following three suttas should be elaborated in the same way.)
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.