Ecclesiastes 4:8 NAS

8 There was a certain man without a adependent, having neither * a son nor a brother, yet there was no end to all his labor. Indeed, 1his eyes were not satisfied with riches and he never asked, "And 2for whom am I laboring and depriving myself of pleasure?" This too is vanity and it is a 3grievous task.

References for Ecclesiastes 4:8