'Evil Spirit' in the Bible

so that napkins and aprons were brought from him to the sick, and their diseases left them, and the evil spirits went out of them.

And some of the travelling Jewish exorcists undertook to call over those that had evil spirits the name of the Lord Jesus, saying, I adjure you by the Jesus whom Paul preaches.

But the evil spirit answered and said, Jesus I know, and Paul I know, but who are you?

And the man in whom the evil spirit was leaped upon them, and overcome them, and prevailed against them, so that they escaped from his house, naked and wounded.