[public domain]

Saint Michael Expelling Lucifer and the Rebellious Angels, by Peter Paul Rubens, 1622

Prayer to Saint Michael

Saint Michael the Archangel,
defend us in battle;
be our protection against the
wickedness and snares of the devil.

May God rebuke him,
we humbly pray; and do thou,
O Prince of the heavenly host,
by the power of God,
thrust into hell Satan
and all the evil spirits
who prowl about the world
seeking the ruin of souls.

Amen.