'Demon' in the Bible

In the synagogue there was a man possessed by the spirit of an unclean demon, and he cried out with a loud voice,

But Jesus rebuked him, saying, “Be quiet and come out of him!” And when the demon had thrown him down in the midst of the people, he came out of him without doing him any harm.

For John the Baptist has come eating no bread and drinking no wine, and you say, ‘He has a demon!’

For He had commanded the unclean spirit to come out of the man. For it had seized him many times; and he was bound with chains and shackles and kept under guard, and yet he would break his bonds and be driven by the demon into the desert.

While he was still approaching, the demon slammed him to the ground and threw him into a convulsion. But Jesus rebuked the unclean spirit, and healed the boy and gave him back to his father.

And He was casting out a demon, and it was mute; when the demon had gone out, the mute man spoke; and the crowds were amazed.