Ecclesiastes 2:20-23

That’s when I called it quits, gave up on anything that could be hoped for on this earth. What’s the point of working your fingers to the bone if you hand over what you worked for to someone who never lifted a finger for it? Smoke, that’s what it is. A bad business from start to finish. So what do you get from a life of hard labor? Pain and grief from dawn to dusk. Never a decent night’s rest. Nothing but smoke.