Ecclesiastes 2:19-22

¹⁹Who knows whether he will be a wise man or a fool? Yet he will have rule over all of my labor in which I have labored, and in which I have shown myself wise under the sun. This also is vanity.

²⁰Therefore I began to cause my heart to despair concerning all the labor in which I had labored under the sun.

²¹For there is a man whose labor is with wisdom, with knowledge, and with skillfulness; yet he shall leave it for his portion to a man who has not labored for it. This also is vanity and a great evil.

²²For what does a man have of all his labor and of the striving of his heart, in which he labors under the sun?