Mark 5:11-13

11Now a large herd of swine was feeding there near the mountains.

12So all the demons begged Him, saying, “Send us to the swine, that we may enter them.”

13And at once Jesus gave them permission. Then the unclean spirits went out and entered the swine (there were about two thousand); and the herd ran violently down the steep place into the sea, and drowned in the sea.