Psalms 90:5

Thou carriest them away as with a flood; they are as a sleep: in the morning they are like grass which groweth up.

Human life is brief and fragile, swept away swiftly and easily as by a rushing flood. It passes like sleep, with people lying as if asleep and gone in a moment. It is like grass that sprouts and grows up in the morning. That same grass is cut down and withers by evening.