Ecclesiastes 2:21

For there is a man whose labour is in wisdom, and in knowledge, and in equity; yet to a man that hath not laboured therein shall he leave it for his portion. This also is vanity and a great evil.

For there is a man whose labour is in wisdom - suppose "there is a man," etc.

And in equity - rather, 'with success,' as the Hebrew ( kishrown (H3788)) is rendered (Ecclesiastes 11:6), 'prosper,' though margin gives 'be right' (Holden.)

This also (is) ... a great evil - not in itself, for, this is the ordinary course of things, but "evil," as regards the chief good, that one should have toiled so fruitlessly.