Parallel
Ecclesiastes 2:19
World English Bible British Edition · Berean Standard Bible
Who knows whether he will be a wise man or a fool? Yet he will have rule over all of my labour in which I have laboured, and in which 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.