Prayer to St. Michael for Exorcism against Satan and the Apostate Angels by Pope Leo XIII
O GLORIOUS ARCHANGEL St Michael, Prince of the heavenly host, defend us in battle, and in the struggle which is ours against the principalities and Powers, against the rulers of this world of darkness, against spirits of evil in high places. Come to the aid of men, whom God created immortal, made in his own image and likeness, and redeemed at a great price from the tyranny of the devil.
Fight this day the battle of the Lord, together with the holy angels, as already thou hast fought the leader of the proud angels, Lucifer, and his apostate host, who were powerless to resist thee, nor was there place for them any longer in Heaven,
But that cruel, that ancient serpent, who is called the devil or Satan, who seduces the whole…