'Knowledge' in the Bible

Then the angel who was talking to me, answering me, said, Have you no knowledge of what these are? And I said, No, my lord.

And he said in answer to me, Have you no knowledge what these are? And I said, No, my lord.

But with a storm-wind I sent them in flight among all the nations of whom they had no knowledge. So the land was waste after them, so that no man went through or came back: for they had made waste the desired land.

And it will be unbroken day, such as the Lord has knowledge of, without change of day and night, and even at nightfall it will be light.