'Demon' in the Bible

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

And Jesus did rebuke him, saying, 'Be silenced, and come forth out of him;' and the demon having cast him into the midst, came forth from him, having hurt him nought;

'For John the Baptist came neither eating bread nor drinking wine, and ye say, He hath a demon;

and as he is yet coming near, the demon rent him, and tore him sore, and Jesus rebuked the unclean spirit, and healed the youth, and gave him back to his father.

And he was casting forth a demon, and it was dumb, and it came to pass, the demon having gone forth, the dumb man spake, and the multitudes wondered,