Mark 5:10 (KJV)

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

But when he saw Jesus afar off, he ran and worshipped him,

And cried with a loud voice, and said, What have I to do with thee, Jesus, thou Son of the most high God? I adjure thee by God, that thou torment me not.

For he said unto him, Come out of the man, thou unclean spirit.

And he asked him, What is thy name? And he answered, saying, My name is Legion: for we are many.

Now there was there nigh unto the mountains a great herd of swine feeding.

And all the devils besought him, saying, Send us into the swine, that we may enter into them.

And forthwith Jesus gave them leave. And the unclean spirits went out, and entered into the swine: and the herd ran violently down a steep place into the sea, (they were about two thousand;) and were choked in the sea.

And they that fed the swine fled, and told it in the city, and in the country. And they went out to see what it was that was done.

And they come to Jesus, and see him that was possessed with the devil, and had the legion, sitting, and clothed, and in his right mind: and they were afraid.