Ecclesiastes 2:19-22

¹⁹Whom I know not whether he will be a wise man or a fool, and he shall have rule over all my labours with which I have laboured and been solicitous: and is there any thing so vain?

²⁰Wherefore I left off and my heart renounced labouring any more under the sun.

²¹For when a man laboureth in wisdom, and knowledge, and carefulness, he leaveth what he hath gotten to an idle man: so this also is vanity, and a great evil.

²²For what profit shall a man have of all his labour, and vexation of spirit, with which he bath been tormented under the sun?