Abyākatasutta
Atha kho aññataro bhikkhu yena bhagavā tenupasaṅkami; upasaṅkamitvā bhagavantaṁ abhivādetvā ekamantaṁ nisīdi. Ekamantaṁ nisinno kho so bhikkhu bhagavantaṁ etadavoca: “ko nu kho, bhante, hetu ko paccayo yena sutavato ariyasāvakassa vicikicchā nuppajjati abyākatavatthūsū”ti?
The Undeclared Points
Then a mendicant went up to the Buddha, bowed, sat down to one side, and said to him: “Sir, what is the cause, what is the reason why a learned noble disciple has no doubts regarding the undeclared points?”