At Sāvatthī. Standing to one side, that deity addressed the Buddha in verse:

“Living in the wilderness, peaceful spiritual practitioners eat just one meal a day: so why is their complexion so clear?”

“They don’t grieve for the past, nor do they pray for the future; they feed on whatever comes that day, that’s why their complexion’s so clear.

Because they pray for the future, and grieve for the past, fools wither away, like a green reed mowed down.”