'Unclean Spirits' in the Bible

They were all so amazed that they debated and questioned each other, saying, “What is this? A new teaching with authority! He commands even the unclean spirits (demons), and they obey Him.”

Jesus gave them permission. And the unclean spirits came out [of the man] and entered the pigs. The herd, numbering about two thousand, rushed down the steep bank into the sea; and they were drowned [one after the other] in the sea.

As He was stepping into the boat, the [Gentile] man who had been demon-possessed was begging with Him [asking] that he might go with Him [as a disciple].

And He called the twelve [disciples] and began to send them out [as His special messengers] two by two, and gave them authority and power over the unclean spirits.

And they were casting out many demons and were anointing with oil many who were sick, and healing them.