Isaiah 6:9; Isaiah 6:10

9 So he told me to go and give the people this message: "No matter how much you listen, you will not understand. No matter how much you look, you will not know what is happening."

10 Then he said to me, "Make the minds of these people dull, their ears deaf, and their eyes blind, so that they cannot see or hear or understand. If they did, they might turn to me and be healed."