Ecclesiastes 2:11; Ecclesiastes 2:17; Ecclesiastes 2:26

11 Then I considered all that my hands had done and the toil I had expended in doing it, and behold, all was vanity and a striving after wind, and there was nothing to be gained under the sun.

17 So I hated life, because what is done under the sun was grievous to me, for all is vanity and a striving after wind.

26 For to the one who pleases him God has given wisdom and knowledge and joy, but to the sinner he has given the business of gathering and collecting, only to give to one who pleases God. This also is vanity and a striving after wind.