'Transitory' in the Bible

Therefore, remove sorrow and anger from your heart and put away pain from your body, for childhood and the prime of life are fleeting.

A voice says, “Call out [prophesy].”Then he answered, “What shall I call out?”[The voice answered:] All humanity is [as frail as] grass, and all that makes it attractive [its charm, its loveliness] is [momentary] like the flower of the field.