'Unclean Spirit' in the Bible

And there was in their synagogue a man who had an unclean spirit; and he cried out,

And the unclean spirit threw him into convulsions, and cried with a loud voice, and came out of him.

And all were amazed, so that they questioned one another, saying: What means this? What new teaching is this, that with authority he commands even the unclean spirits, and they obey him?

And unclean spirits, when they saw him, fell down before him, and cried out, saying: Thou art the Son of God.

For they said: He has an unclean spirit.

And when he had come out of the ship, immediately there met him from the tombs a man with an unclean spirit,

For he had said to him: Unclean spirit, come out of the man.

And Jesus immediately gave them leave. And the unclean spirits came out and entered into the swine; and the herd (they were about two thousand,) rushed down a steep place into the sea, and were strangled in the sea.

And he called to him the twelve, and began to send them out, two and two, and gave them authority over unclean spirits.

For a woman, whose little daughter had an unclean spirit, heard of him, and came and fell at his feet;

When Jesus saw that a multitude came running together, he rebuked the unclean spirit, and said to it: Dumb and deaf spirit, I command you, come out of him, and enter into him no more.