Ecclesiastes 4:4; Ecclesiastes 4:7-8

4 Next I realized that all effort and achievement stem from one person's envy of another. This too is futility and feeding on wind.

7 Then I turned my attention to something else under the sun that is pointless:

8 the situation in which a solitary individual without a companion, with neither son nor brother, keeps on working endlessly but never has enough wealth. "For whom" [he should ask], "am I working so hard and denying myself pleasure?"This too is truly pointless, a sorry business.