Ecclesiastes 2:11, 15, 17, 19, 21, 23, 26

Thus I considered all my activities which my hands had done and the labor which I had exerted, and behold all was vanity and striving after wind and there was no profit under the sun.

Then I said to myself, “As is the fate of the fool, it will also befall me. Why then have I been extremely wise?” So I said to myself, “This too is vanity.”

So I hated life, for the work which had been done under the sun was grievous to me; because everything is futility and striving after wind.

And who knows whether he will be a wise man or a fool? Yet he will have control over all the fruit of my labor for which I have labored by acting wisely under the sun. This too is vanity.

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.

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

For to a person who is good in His sight He has given wisdom and knowledge and joy, while to the sinner He has given the task of gathering and collecting so that he may give to one who is good in God’s sight. This too is vanity and striving after wind.