'Whether' in the Bible

Who knows whether he will be a wise man or a fool? Yet he will have rule over all of my labor in which I have labored, and in which I have shown myself wise under the sun. This also is vanity.

Who knows the spirit of man, whether it goes upward, and the spirit of the animal, whether it goes downward to the earth?"

The sleep of a laboring man is sweet, whether he eats little or much; but the abundance of the rich will not allow him to sleep.

For all this I laid to my heart, even to explore all this: that the righteous, and the wise, and their works, are in the hand of God; whether it is love or hatred, man doesn't know it; all is before them.

In the morning sow your seed, and in the evening don't withhold your hand; for you don't know which will prosper, whether this or that, or whether they both will be equally good.

For God will bring every work into judgment, with every hidden thing, whether it is good, or whether it is evil.