'Whether' in the Bible

I said {to myself}, "Come! I will test pleasure {to see whether it is worthwhile}." But look, "This also [is] vanity!"

I decided to indulge in wine, while still remaining committed to wisdom. I also tried to indulge in foolishness, just enough to determine whether it was good for human beings under heaven given the short time of their lives.

And who knoweth whether he shall be a wise man or a fool? yet shall he have rule over all my labour wherein I have laboured, and wherein I have shewed myself wise under the sun. This is also vanity.

Who knows whether the spirit of human beings ascends, and whether the spirit of animals descends to the earth?

The sleep of a labouring man is sweet, whether he eat little or much: but the abundance of the rich will not suffer him to sleep.

Whatever exists has already been named [long ago], and it is known what [a frail being] man is; for he cannot dispute with Him who is mightier than he.

And so I have seen the wicked buried, and they went in, even from the Holy Place they go, and they are forgotten in the city whether they had so done. This also is vanity.

Indeed, I took all this to heart and explained it all: the righteous, the wise, and their works are in God’s hands.People don’t know whether to expect love or hate. Everything lies ahead of them.

If the clouds are full, they will pour out rain on the earth;whether a tree falls to the south or the north,the place where the tree falls, there it will lie.

In the morning sow thy seed, and in the evening withhold not thine hand: for thou knowest not whether shall prosper, either this or that, or whether they both shall be alike good.

For God shall bring every work into judgment, with every secret thing, whether it be good, or whether it be evil.