Holy Michael, the Archangel, defend us in battle. Be our safeguard against the wickedness and snares of the devil. May God rebuke him, we humbly pray; and do you, O Prince of the heavenly host, by the power of God cast into hell Satan and all the evil spirits who wander through the world seeking the ruin of souls. Amen.
Further reading
Jean Daniélou explores the role of angels through the writings of the Church Fathers, offering theological background for prayers to St. Michael and the guardian angels.