Cross reference
Ecclesiastes 3:9
9 What profit hath he that worketh in that wherein he laboreth?
Ecclesiastes 1:3
3 What profit hath man of all his labor wherein he laboreth under the sun?
Proverbs 14:23
23 In all labor there is profit; But the talk of the lips `tendeth' only to penury.
Ecclesiastes 2:11
11 Then I looked on all the works that my hands had wrought, and on the labor that I had labored to do; and, behold, all was vanity and a striving after wind, and there was no profit under the sun.
Ecclesiastes 5:16
16 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?
Matthew 16:26
26 For what shall a man be profited, if he shall gain the whole world, and forfeit his life? or what shall a man give in exchange for his life?
Ecclesiastes 2:22-23
22 For what hath a man of all his labor, and of the striving of his heart, wherein he laboreth under the sun?
23 For all his days are `but' sorrows, and his travail is grief; yea, even in the night his heart taketh no rest. This also is vanity.