Parallel
Ecclesiastes 2:19
Jewish Publication Society 1917 · Berean Standard Bible
And who knoweth whether he will be a wise man or a fool? yet will he have rule over all my labour wherein I have laboured, and wherein I have shown myself wise under the sun. This also is vanity.
And who knows whether that man will be wise or foolish? Yet he will take over all the labor at which I have worked skillfully under the sun. This too is futile.