Mark 3:11

So the devils besought him, saying, If thou cast us out, suffer us to go away into the herd of swine.

And there was in their synagogue a man with an unclean spirit; and he cried out,

And always, night and day, he was in the mountains, and in the tombs, crying, and cutting himself with stones.

And devils also came out of many, crying out, and saying, Thou art Christ the Son of God. And he rebuking them suffered them not to speak: for they knew that he was Christ.

The same followed Paul and us, and cried, saying, These men are the servants of the most high God, which shew unto us the way of salvation.

Then certain of the vagabond Jews, exorcists, took upon them to call over them which had evil spirits the name of the LORD Jesus, saying, We adjure you by Jesus whom Paul preacheth. And there were seven sons of one Sceva, a Jew, and chief of the priests, which did so. And the evil spirit answered and said, Jesus I know, and Paul I know; but who are ye? And the man in whom the evil spirit was leaped on them, and overcame them, and prevailed against them, so that they fled out of that house naked and wounded. And this was known to all the Jews and Greeks also dwelling at Ephesus; and fear fell on them all, and the name of the Lord Jesus was magnified.

Thou believest that there is one God; thou doest well: the devils also believe, and tremble.