Ecclesiastes 4:7-8

7Then I looked again at vanity under the sun. 8There was a certain man without a 1dependent, having neither a son nor a brother, yet there was no end to all his labor. Indeed, 2his eyes were not satisfied with riches and he never asked, “And 3for whom am I laboring and depriving myself of pleasure?” This too is vanity and it is a 4grievous task.