Ecclesiastes 2:21-23

21Here is someone who had worked hard with wisdom, knowledge, and skill. Yet, he must turn over his estate to someone else, who didn’t work for it. Even this is pointless and a terrible tragedy.

22What do people get from all of their hard work and struggles under the sun?

23Their entire life is filled with pain, and their work is unbearable. Even at night their minds don’t rest. Even this is pointless.