Ecclesiastes 2:18-20

¹⁸And I have hated all my labour that I labour at under the sun, because I leave it to a man who is after me.

¹⁹And who knoweth whether he is wise or foolish? yet he doth rule over all my labour that I have laboured at, and that I have done wisely under the sun! this also is vanity.

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