Ecclesiastes 2:20-24

Therefore I completely despaired over all the fruit of my labor for which I had labored under the sun.

When there is a person who has labored with wisdom, knowledge, and skill, and then gives his legacy to one who has not labored for it; this too is futility and a great evil.

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

Because all his days his activity is painful and irritating; even at night his mind does not rest. This too is futility.

There is nothing better for a person than to eat and drink, and show himself some good in his trouble. This too I have seen, that it is from the hand of God.