Ecclesiastes 4:4-8

4And I saw all labour, and all success of work, that it is man's jealousy of his neighbour. This also is vanity and pursuit of the wind.

5The fool foldeth his hands together, and eateth his own flesh.

6Better is a handful with quietness, than both hands full with labour and pursuit of the wind.

7And I returned and saw vanity under the sun.

8There is one [alone] and without a second; also he hath neither son nor brother: yet is there no end of all his labour, neither is his eye satisfied with riches, and [he saith not], For whom then am I labouring, and depriving my soul of good? This also is vanity and a grievous occupation.