'Laboreth' in the Bible

What profit hath man of all his labor wherein he laboreth under the sun?

For what hath a man of all his labor, and of the striving of his heart, wherein he laboreth under the sun?

What profit hath he that worketh in that wherein he laboreth?

And this also is a grievous evil, that in all points as he came, so shall he go: and what profit hath he that he laboreth for the wind?

Behold, that which I have seen to be good and to be comely is for one to eat and to drink, and to enjoy good in all his labor, wherein he laboreth under the sun, all the days of his life which God hath given him: for this is his portion.