'Certainty' in the Bible

Know for a certainty that the LORD your God will no more drive out any of these nations from before you; but they shall be snares and traps unto you, and scourges in your sides, and thorns in your eyes, until ye perish from off this good land which the LORD your God hath given you.

See therefore, and take knowledge of all the lurking places where he hideth himself, and come ye again to me with the certainty, and I will go with you: and it shall come to pass, if he be in the land, that I will search him out throughout all the thousands of Judah.

That I might make thee know the certainty of the words of truth; that thou mightest answer the words of truth to them that send unto thee?

The king answered and said, I know of certainty that ye would gain the time, because ye see the thing is gone from me.

That thou mightest know the certainty of those things, wherein thou hast been instructed.

And some cried one thing, some another, among the multitude: and when he could not know the certainty for the tumult, he commanded him to be carried into the castle.

On the morrow, because he would have known the certainty wherefore he was accused of the Jews, he loosed him from his bands, and commanded the chief priests and all their council to appear, and brought Paul down, and set him before them.