Ecclesiastes 4:4-8

4Again, I considered all labour, and every right work, that for this a man is envied by his neighbour. This is also vanity and vexation of spirit.12 5The fool foldeth his hands together, and eateth his own flesh. 6Better is an handful with quietness, than both the hands full with toil and vexation of spirit.

7Then I returned, and I saw vanity under the sun. 8There is one alone, and there is not a second; yea, he hath neither child nor brother: yet is there no end of all his labour; neither is his eye satisfied with riches; neither saith he, For whom do I labour, and bereave my soul of good? This is also vanity, yea, it is a grievous labour.