'Do You Not Know' in the Bible

Pharaoh's servants said to him, "How long will this man be a menace to us? Release the people so that they may serve the Lord their God. Do you not know that Egypt is destroyed?"

Three thousand men of Judah went down to the cave in the cliff of Etam and said to Samson, "Do you not know that the Philistines rule over us? Why have you done this to us?" He said to them, "I have only done to them what they have done to me."

Do you not know? Do you not hear? Has it not been told to you since the very beginning? Have you not understood from the time the earth's foundations were made?

Do you not know? Have you not heard? The Lord is an eternal God, the creator of the whole earth. He does not get tired or weary; there is no limit to his wisdom.

"Do you really think anyone can hide himself where I cannot see him?" the Lord asks. "Do you not know that I am everywhere?" the Lord asks.