“Vappa, take an individual who, due to the fading away of ignorance and the arising of knowledge, is restrained in body, speech, and mind. Do you see any reason why defilements giving rise to painful feelings would defile that person in the next life?” “Sir, I do see such a case. Take someone who did bad deeds in a past life. But the result of that has not yet ripened. For this reason defilements giving rise to painful feelings would defile that person in the next life.” But this conversation between Mahāmoggallāna and Vappa was left unfinished.

Then in the late afternoon, the Buddha came out of retreat and went to the assembly hall. He sat down on the seat spread out, and said to Mahāmoggallāna,

“Moggallāna, what were you sitting talking about just now? What conversation was left unfinished?” Moggallāna repeated the entire conversation to the Buddha, and concluded: “This was my conversation with Vappa that was unfinished when the Buddha arrived.”