'Whether' in the Bible

And who knows whether he will be a wise man or a fool? Yet he will have control over all the fruit of my labor for which I have labored by acting wisely under the sun. This too is vanity.

The sleep of the working man is pleasant, whether he eats little or much; but the full stomach of the rich man does not allow him to sleep.

For I have taken all this to my heart and explain it that righteous men, wise men, and their deeds are in the hand of God. Man does not know whether it will be love or hatred; anything awaits him.

For God will bring every act to judgment, everything which is hidden, whether it is good or evil.