Luke 8:29-33

He said this because Jesus was commanding the evil spirit to come out of the man. Many times it had taken hold of him. Though he had been kept under guard and chained hand and foot, he had broken his chains and had been forced by the demon out into a lonely place. Jesus asked him, “What is your name?” He answered, “Legion,” because many demons were in him. The demons begged Jesus not to send them into eternal darkness. A large herd of pigs was feeding on a hill, and the demons begged Jesus to allow them to go into the pigs. So Jesus allowed them to do this. When the demons came out of the man, they went into the pigs, and the herd ran down the hill into the lake and was drowned.