Ecclesiastes 2:23; Ecclesiastes 2:26

23 Because all his days his task is painful and grievous; even at night his mind does not rest. This too is vanity.

26 For to a person who is good in His sight He has given wisdom and knowledge and joy, while to the sinner He has given the task of gathering and collecting so that he may give to one who is good in God's sight. This too is vanity and striving after wind.