'Unclean Spirit' in the Bible

And they were all amazed and said to one another, "What is this word? For with authority and power he commands the unclean spirits, and they come out!"

and those who were troubled with unclean spirits were cured.

For he had commanded the unclean spirit to come out of the man. For many times it had seized him, and he was kept under guard, bound with chains and shackles; and he broke the bonds and was driven by the demon into the wilderness.

While he was coming, the demon threw him and convulsed him. But Jesus rebuked the unclean spirit, and healed the boy, and gave him back to his father.

"When an unclean spirit goes out of a man, he goes through dry places, seeking rest; and finding none, he says, 'I will return to my house from which I came.'