So I have heard. At one time the Buddha was staying near Sāvatthī in Jeta’s Grove, Anāthapiṇḍika’s monastery.

Then after the meal, on return from almsround, several mendicants sat together in the assembly hall and this discussion came up among them. “It’s incredible, reverends, it’s amazing, how the Blessed One, who knows and sees, the perfected one, the fully awakened Buddha has said that mindfulness of the body, when developed and cultivated, is very fruitful and beneficial.” But their conversation was left unfinished. Then the Buddha came out of retreat and went to the assembly hall. He sat down on the seat spread out and addressed the mendicants: “Mendicants, what were you sitting talking about just now? What conversation was left unfinished?” So the mendicants told him what they had been talking about. The Buddha said: