At Sāvatthī. Sāvatthinidānaṁ.

“Mendicants, one thing helps give rise to the noble eightfold path. “Ekadhammo, bhikkhave, bahūpakāro ariyassa aṭṭhaṅgikassa maggassa uppādāya. What one thing? Katamo ekadhammo? It’s good friendship. Yadidaṁ—kalyāṇamittatā. A mendicant with good friends can expect to develop and cultivate the noble eightfold path. Kalyāṇamittassetaṁ, bhikkhave, bhikkhuno pāṭikaṅkhaṁ—ariyaṁ aṭṭhaṅgikaṁ maggaṁ bhāvessati, ariyaṁ aṭṭhaṅgikaṁ maggaṁ bahulīkarissati.

And how does a mendicant with good friends develop and cultivate the noble eightfold path? Kathañca, bhikkhave, bhikkhu kalyāṇamitto ariyaṁ aṭṭhaṅgikaṁ maggaṁ bhāveti, ariyaṁ aṭṭhaṅgikaṁ maggaṁ bahulīkaroti? It’s when a mendicant develops right view, right thought, right speech, right action, right livelihood, right effort, right mindfulness, and right immersion, which culminate in the removal of greed, hate, and delusion. Idha, bhikkhave, bhikkhu sammādiṭṭhiṁ bhāveti rāgavinayapariyosānaṁ dosavinayapariyosānaṁ mohavinayapariyosānaṁ …pe… sammāsamādhiṁ bhāveti rāgavinayapariyosānaṁ dosavinayapariyosānaṁ mohavinayapariyosānaṁ. That’s how a mendicant with good friends develops and cultivates the noble eightfold path.” Evaṁ kho, bhikkhave, bhikkhu kalyāṇamitto ariyaṁ aṭṭhaṅgikaṁ maggaṁ bhāveti, ariyaṁ aṭṭhaṅgikaṁ maggaṁ bahulīkarotī”ti.

Paṭhamaṁ.