Ecclesiastes 2:20-22

Young's Literal Translation

²⁰ And I turned round to cause my heart to despair concerning all the labour that I laboured at under the sun.

²¹ For there is a man whose labour [is] in wisdom, and in knowledge, and in equity, and to a man who hath not laboured therein he giveth it -- his portion! Even this [is] vanity and a great evil.

²² For what hath been to a man by all his labour, and by the thought of his heart that he laboured at under the sun?