Paṭhamadhammavihārīsutta
Atha kho aññataro bhikkhu yena bhagavā tenupasaṅkami; upasaṅkamitvā bhagavantaṁ abhivādetvā ekamantaṁ nisīdi. Ekamantaṁ nisinno kho so bhikkhu bhagavantaṁ etadavoca: “‘dhammavihārī, dhammavihārī’ti, bhante, vuccati. Kittāvatā nu kho, bhante, bhikkhu dhammavihārī hotī”ti?
One Who Lives by the Teaching (1st)
Then a mendicant went up to the Buddha, bowed, sat down to one side, and said to him: “Sir, they speak of ‘one who lives by the teaching’. How is a mendicant who lives by the teaching defined?”