'Knowledge' in the Bible

And in time death overtook all that generation; and another generation came after them, having no knowledge of the Lord or of the things which he had done for Israel.

Now his father and mother had no knowledge that this was the purpose of the Lord, who had the destruction of the Philistines in mind. Now the Philistines at that time were ruling over Israel.

Then the five men who had gone to make a search through the country of Laish, said to their brothers, Have you knowledge that in these houses there is an ephod and family gods and a pictured image and a metal image? So now you see what to do.