'Unclean' in the Bible
Immediately there was in their synagogue a man with an unclean spirit, and he cried out,
The unclean spirit, convulsing him and crying with a loud voice, came out of him.
They were all amazed, so that they questioned among themselves, saying, "What is this? A new teaching? For with authority he commands even the unclean spirits, and they obey him!"
The unclean spirits, whenever they saw him, fell down before him, and cried, "You are the Son of God!"
When he had come out of the boat, immediately a man with an unclean spirit met him out of the tombs.
For he said to him, "Come out of the man, you unclean spirit!"
At once Jesus gave them permission. The unclean spirits came out and entered into the pigs. The herd of about two thousand rushed down the steep bank into the sea, and they were drowned in the sea.
He called to himself the twelve, and began to send them out two by two; and he gave them authority over the unclean spirits.
For a woman, whose little daughter had an unclean spirit, having heard of him, came and fell down at his feet.
When Jesus saw that a multitude came running together, he rebuked the unclean spirit, saying to him, "You mute and deaf spirit, I command you, come out of him, and never enter him again!"