Ecclesiastes 2:8

2:8 I also amassed silver and gold for myself,

as well as valuable treasures taken from kingdoms and provinces.

I acquired male singers and female singers for myself,

and what gives a man sensual delight – a harem of beautiful concubines!

Ecclesiastes 2:21

2:21 For a man may do his work with wisdom, knowledge, and skill;

however, he must hand over the fruit of his labor as an inheritance

to someone else who did not work for it.

This also is futile, and an awful injustice!

Ecclesiastes 5:6

5:6 Do not let your mouth cause you to sin,

and do not tell the priest, “It was a mistake!”

Why make God angry at you

so that he would destroy the work of your hands?”