Their story
Parthenius came from Melitopolis. As a boy he fished in his spare time, sold his catch, and gave the money to the poor. He became Bishop of Lampsacus and, with Constantine's permission, destroyed the pagan temples and idols in his city.
A story is told that when he ordered a demon out of a long-possessed man, the demon asked for somewhere to go. Parthenius offered himself: "Enter into me if thou canst." The demon cried that it could not live in a body kept holy for God, and fled.
