'Knew' in the Bible

And the woman had taken and concealed the two men; and she said, Yes, the men did come unto me, but I knew not whence they were;

And it came to pass when the king of Ai saw it, that the men of the city hasted and rose early, and went out against Israel to battle, he and all his people, at the appointed place before the plain. But he knew not that there was an ambush against him behind the city.