'Demon' in the Bible

And there was in the synagogue a man having a spirit of an unclean demon, and he cried with a loud voice,

And Jesus rebuked him, saying, Hold thy peace, and come out from him. And the demon, having thrown him down into the midst, came out from him without doing him any injury.

For John the baptist has come neither eating bread nor drinking wine, and ye say, He has a demon.

For he had commanded the unclean spirit to go out from the man. For very often it had seized him; and he had been bound, kept with chains and fetters; and breaking the bonds he was driven by the demon into the deserts.

But as he was yet coming, the demon tore him and dragged him all together. And Jesus rebuked the unclean spirit, and healed the child and gave him back to his father.

And he was casting out a demon, and it was dumb; and it came to pass, the demon being gone out, the dumb man spoke. And the crowds wondered.