In late medieval Christianity, Michael, together with Saint George, became the patron saint of chivalry and is now also considered the patron saint of police officers, paramedics, firefighters and the military.

Original Prayer is as Follows:

Sancte Michael Archangele,

defende nos in proelio;

contra nequitiam et insidias diaboli esto praesidium.

Imperet illi Deus, supplices deprecamur:

tuque, Princeps militiae Caelestis,

satanam aliosque spiritus malignos,

qui ad perditionem animarum pervagantur in mundo,

divina virtute in infernum detrude.

Amen.

Saint Michael 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, cast into hell

Satan and all the evil spirits

who prowl through the world seeking the ruin of souls.

Amen.