Ecclesiastes 2:18-20

New King James Version

¹⁸ Then I hated all my labor in which I had toiled under the sun, because ^(A)I must leave it to the man who will come after me. ¹⁹ And who knows whether he will be wise or a fool? Yet he will rule over all my labor in which I toiled and in which I have shown myself wise under the sun. This also is vanity. ²⁰ Therefore I turned my heart and despaired of all the labor in which I had toiled under the sun.