Ecclesiastes 2:21-24 New American Standard Bible (NASB)

21. When there is a man who has labored with wisdom, knowledge and skill, then he gives his legacy to one who has not labored with them. This too is vanity and a great evil.

22. For what does a man get in all his labor and in his striving with which he labors under the sun?

23. Because all his days his task is painful and grievous; even at night his mind does not rest. This too is vanity.

24. There is nothing better for a man than to eat and drink and tell himself that his labor is good. This also I have seen that it is from the hand of God.

Ecclesiastes 2