Ecclesiastes 2:11 Then I saw all the works which my hands had made, and everything I had been working to do; and I saw that all was to no purpose and desire for wind, and there was no profit under the sun. (See NAS)
Ecclesiastes 3:22 So I saw that there is nothing better than for a man to have joy in his work--because that is his reward. Who will make him see what will come after him? (See NAS)