'Unclean Spirits' in the Bible

All the people were so stunned that they kept saying to each other, "What is this? A new teaching with authority! He tells even the unclean spirits what to do, and they obey him!"

Whenever the unclean spirits saw him, they would fall down in front of him and scream, "You are the Son of God!"

So he let them do this. The unclean spirits came out of the man and went into the pigs, and the herd of about 2,000 rushed down a steep slope into the sea and drowned there.

He called the Twelve and began to send them out two by two, giving them authority over unclean spirits.