Mark 8:17-18
8:17 When he learned of this, Jesus said to them, “Why are you arguing about having no bread? Do you still not see or understand? Have your hearts been hardened?
8:18 Though you have eyes, don’t you see? And though you have ears, can’t you hear? Don’t you remember?
Mark 8:21
8:21 Then he said to them, “Do you still not understand?”