Luke 8:30-33

Jesus asked him, saying, “What is your name?” And he said, “Legion,” because many demons had entered him. And they begged Him that He would not command them to go out into the abyss. Now a herd of many swine was feeding there on the mountain. So they begged Him that He would permit them to enter them. And He permitted them. Then the demons went out of the man and entered the swine, and the herd ran violently down the steep place into the lake and drowned.