‘Don’t run back to the past, don’t anticipate the future. What’s past is left behind, the future has not arrived; and any present phenomenon you clearly discern in every case. The unfaltering, the unshakable: having known that, foster it. Today’s the day to keenly work—who knows, tomorrow may bring death! For there is no bargain to be struck with Death and his mighty horde. One who keenly meditates like this, tireless all night and day: that’s who has one fine night—so declares the peaceful sage.’

And that’s what I meant when I said: ‘I shall teach you the summary recital and the analysis of the one who has one fine night.’” That is what the Buddha said. Satisfied, the mendicants approved what the Buddha said.

Middle Discourses 132 Ānanda and One Fine Night