AKJV(i)
20 Therefore I went about to cause my heart to despair of all the labor which I took under the sun.
21 For there is a man whose labor is in wisdom, and in knowledge, and in equity; yet to a man that has not labored therein shall he leave it for his portion. This also is vanity and a great evil.
22 For what has man of all his labor, and of the vexation of his heart, wherein he has labored under the sun?
23 For all his days are sorrows, and his travail grief; yes, his heart takes not rest in the night. This is also vanity.