Vita S. Antoni (Life of St. Anthony)

⁶³ Afterwards, on another occasion, having descended to the outer cells, he was asked to enter a vessel and pray with the monks, and he alone perceived an exceedingly unpleasant smell. But those on board said that the stench arose from the fish and salt meat in the ship. He replied however, the smell was different from that; and while he was speaking, a youth with an evil spirit, who had come and hidden himself in the ship, cried out. But the demon being rebuked in the name of the Lord Jesus Christ departed from him, and the man became whole. And all knew that the evil smell arose from the demon.

64. And another, a person of rank, came to him, possessed by a demon; and the demon was so terrible that the man possessed did not know that he was coming to Antony. But he even ate the excreta from his body. So those who brought him besought Antony to pray for him. And Antony pitying the young man prayed and kept watch with him all the night. And about dawn the young man suddenly attacked Antony and gave him a push. But when those who came with him were angry, Antony said, 'Be not angry with the young man, for it is not he, but the demon which is in him. And being rebuked and commanded to go into dry places, the demon became raging mad, and he has done this. Wherefore give thanks to the Lord, for his attack on me thus is a sign of the departure of the evil spirit.' When Antony had said this, straightway the young man had become whole, and having come at last to his right mind, knew where he was, and saluted the old man and gave thanks to God.