James 4:14
"Whereas ye know not what shall be on the morrow. For what is your life? It is even a vapour, that appeareth for a little time, and then vanisheth away."
Cross References (ranked by relevance)
For all flesh is as grass, and all the glory of man as the flower of grass. The grass withereth, and the flower thereof falleth away:
Behold, thou hast made my days as an handbreadth; and mine age is as nothing before thee: verily every man at his best state is altogether vanity. Selah.
For my days are consumed like smoke, and my bones are burned as an hearth.
But the rich, in that he is made low: because as the flower of the grass he shall pass away.
Remember how short my time is: wherefore hast thou made all men in vain?
But the end of all things is at hand: be ye therefore sober, and watch unto prayer.
Mine age is departed, and is removed from me as a shepherd’s tent: I have cut off like a weaver my life: he will cut me off with pining sickness: from day even to night wilt thou make an end of me.