Dhammakathikasutta
Sāvatthiyaṁ … Atha kho aññataro bhikkhu yena bhagavā tenupasaṅkami; upasaṅkamitvā bhagavantaṁ abhivādetvā ekamantaṁ nisīdi. Ekamantaṁ nisinno kho so bhikkhu bhagavantaṁ etadavoca: “‘dhammakathiko dhammakathiko’ti, bhante, vuccati. Kittāvatā nu kho, bhante, dhammakathiko hotī”ti?
A Dhamma Speaker
At Sāvatthī. Then a mendicant went up to the Buddha, bowed, sat down to one side, and said to him: “Sir, they speak of a ‘Dhamma speaker’. How is a Dhamma speaker defined?”