Bede the Venerable — as excerpted in the Catena Aurea on Luke 8:26-39

“He enquires not his name as ignorant of it, but that when the demoniac had confessed the plague which he endured, the power of the Healer might shine forth more welcome to him. But the priests also of our time, who through the grace of exorcism are able to cast out devils, are wont to say that the sufferers can no otherwise be cured than by openly telling in confession every thing which either waking or sleeping they have endured from the unclean spirits, and above all when they imagine that the devils seek and obtain the possession of the human body. So also here the confession is added, And he said, Legion, because many devils were entered into him.”