Soṇasutta
Ekaṁ samayaṁ bhagavā rājagahe viharati veḷuvane kalandakanivāpe. Atha kho soṇo gahapatiputto yena bhagavā tenupasaṅkami; upasaṅkamitvā bhagavantaṁ abhivādetvā ekamantaṁ nisīdi. Ekamantaṁ nisinno kho soṇo gahapatiputto bhagavantaṁ etadavoca: “ko nu kho, bhante, hetu, ko paccayo yena m’idhekacce sattā diṭṭheva dhamme no parinibbāyanti? Ko pana, bhante, hetu, ko paccayo yena m’idhekacce sattā diṭṭheva dhamme parinibbāyantī”ti? (Yathā purimasuttantaṁ, evaṁ vitthāretabbaṁ.) Ayaṁ kho, soṇa, hetu, ayaṁ paccayo yena m’idhekacce sattā diṭṭheva dhamme parinibbāyantīti.
With Soṇa
At one time the Buddha was staying near Rājagaha in the Bamboo Grove, the squirrels’ feeding ground. Then the householder Soṇa went up to the Buddha, bowed, sat down to one side, and said to him: “What is the cause, sir, what is the reason why some sentient beings are not fully extinguished in this very life? What is the cause, sir, what is the reason why some sentient beings are fully extinguished in this very life?” … (Tell in full as in SN 35.118.)