'Do You Not Know' in the Bible

Or do you despise the riches of his kindness and forbearance and long patience? Do you not know that the kindness of God is leading you to repentance?

For do you not know that all of us who have been baptized into Jesus Christ, have been baptized into his death?

Do you not know that when you surrender yourselves as slaves to any one to obey him, you are his slaves whom you obey; whether it be sin, whose end is death, or obedience, whose end is righteousness?

God did not cast off his people whom he foreknew. For do you not know what is said in the Scripture about Elijah? how he pleaded with God against Israel, saying,