Ecc Ecclesiastes, chapter Ecclesiastes, chapter 2
Therefore I went about to cause my heart to despair of all the labour which I took under the sun.
For there is a man whose labour [is] in wisdom, and in knowledge, and in equity; yet to a man that has not laboured in it shall he leave it [for] his portion. This also [is] vanity and a great evil.
For what has man of all his labour, and of the anguish of his heart, wherein he has laboured under the sun?
For all his days [are] sorrows, and his travail grief; yes, his heart takes not rest in the night. This is also vanity.