Ecclesiastes 2:18-23

¹⁸And I hated the whole of my labour which I took under the sun; because I must leave it to the man who will come after me.

¹⁹And who knows whether he will be a wise man or a fool? and whether he will have power over all my labour in which I laboured, and wherein I grew wise under the sun? this is also vanity.

²⁰So I went about to dismiss from my heart all my labour wherein I had laboured under the sun.

²¹For there is such a man that his labour is in wisdom, and in knowledge, and in fortitude; yet this man shall give his portion to one who has not laboured therein. This is also vanity and great evil.

²²For it happens to a man in all his labour, and in the purpose of his heart wherein he labours under the sun.

²³For all his days are days of sorrows, and vexation of spirit is his; in the night also his heart rests not. This is also vanity.