Mark 1:25-27

1:25 But Jesus rebuked him: “Silence! Come out of him!” 1:26 After throwing him into convulsions, the unclean spirit cried out with a loud voice and came out of him. 1:27 They were all amazed so that they asked each other, “What is this? A new teaching with authority! He even commands the unclean spirits and they obey him.”

Mark 1:34

1:34 So he healed many who were sick with various diseases and drove out many demons. But he would not permit the demons to speak, because they knew him.