Ecclesiastes 2:17-19

¹⁷Therefore I hated life, because what is done under the sun appeared evil to me. For all is vanity, and striving after wind.

¹⁸Yea, I hated all my labor which I had performed under the sun, because I must leave it to the man that shall be after me.

¹⁹And who knoweth whether he shall be a wise man or a fool? Yet shall he be lord of all the labor with which I have wearied myself, and in which I have shown myself wise under the sun. This also is vanity.