Luke 8:30 KJV
And Jesus asked him, saying, What is thy name? And he said, Legion: because many devils were entered into him.
Luke 8:30, King James Version
In context
29 (For he had commanded the unclean spirit to come out of the man. For oftentimes it had caught him: and he was kept bound with chains and in fetters; and he brake the bands, and was driven of the devil into the wilderness.)
30 And Jesus asked him, saying, What is thy name? And he said, Legion: because many devils were entered into him.
31 And they besought him that he would not command them to go out into the deep.