Ecclesiastes 4:7-8

⁷Then I returned, and I saw vanity under the sun.

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