Pāli · Sutta Piṭaka (Pāli, Mahāsaṅgīti)
Tatiyauposathasutta
Sāvatthinidānaṁ. Ekamantaṁ nisinno kho so bhikkhu bhagavantaṁ etadavoca: “ko nu kho, bhante, hetu, ko paccayo, yena m’idhekacce saṁsedajā nāgā uposathaṁ upavasanti vossaṭṭhakāyā ca bhavantī”ti? (Sabbaṁ vitthāretabbaṁ.) “Ayaṁ kho, bhikkhu, hetu, ayaṁ paccayo, yena m’idhekacce saṁsedajā nāgā uposathaṁ upavasanti vossaṭṭhakāyā ca bhavantī”ti.
English · Bhikkhu Sujato
Sabbath (3rd)
At Sāvatthī. Seated to one side, that mendicant said to the Buddha: “Sir, what is the cause, what is the reason why some moisture-born dragons keep the sabbath, having transformed their bodies?” (Tell all in full.)