Ecclesiastes 4:4; Ecclesiastes 4:7-8

4 I also saw that man works hard and accomplishes a lot. But he does it only because he wants what his neighbor has. That doesn't have any meaning either. It's like chasing the wind.

7 Again I saw something on earth that didn't mean anything.

8 A man lived all by himself. He didn't have any sons or brothers. His hard work never ended. But he wasn't happy with what he had. "Who am I working so hard for?" he asked. "Why don't I get the things I enjoy?" That doesn't have any meaning either. In fact, it's a very bad deal!