Mark 5:11

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

9 And he asked him, What is thy name? And he saith unto him, My name is Legion; for we are many.

10 And he besought him much that he would not send them away out of the country.

11 Now there was there on the mountain side a great herd of swine feeding.

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

13 And he gave them leave. And the unclean spirits came out, and entered into the swine: and the herd rushed down the steep into the sea, [in number] about two thousand; and they were drowned in the sea.

14 And they that fed them fled, and told it in the city, and in the country. And they came to see what it was that had come to pass.