Mark 1:25-26, 34

Jesus rebuked him, saying, “Be quiet (muzzled, silenced), and come out of him!” The unclean spirit threw the man into convulsions, and screeching with a loud voice, came out of him.

And Jesus healed many who were suffering with various diseases; and He drove out many demons, but would not allow the demons to speak, because they knew Him [recognizing Him as the Son of God].