增壹阿含經 24.5.p143

24.5.p143

After the Bhagavān had eaten, he returned to his place for the night. In the middle of the night, a large, black cloud appeared, and it brought a great rainstorm. The great Nairañjanā River became a raging torrent. Kāśyapa thought, “The river is a raging torrent. Surely that ascetic will be swept away! I’ll go look for him now!”