Original Prayer to St. Michael the Archangel written by Pope Leo XIII in 1886

English version

Glorious Prince of the Celestial Host, St. Michael the Archangel, defend us in the conflict which we have to sustain against principalities and powers, against the rulers of the world of darkness, against the spirits of wickedness in the high places (Eph 6:12). Come to the rescue of men whom God has redeemed at a great price from the tyranny of the devil. It is thou whom Holy Church venerates as her guardian and her protector; thou whom the Lord has charged to conduct redeemed souls into heaven. Pray therefore, the God of peace, to subdue Satan beneath our feet, that he may no longer retain men captive nor do injury to the Church. Present our prayers to the Most High, that without delay they may draw His mercy down upon us. Seize “the dragon, the ancient serpent, which is the devil and Satan,” bind him and cast him into the bottomless pit…”that he may no longer seduce the nations” (Rev 20:2-3).

Latin version

Prínceps gloriosíssime caeléstis milítiae, sancte Míchael Archángele, defénde nos in prœlio advérsus príncipes et potestátes, advérsus mundi rectóres tenebrárum harum, contra spirituália nequítiae in caeléstibus. Veni in auxílium hóminum, quos Deus ad imáginem similitúdinis suae fecit, et a tyránnide diáboli emit prétio magno. Te custódem et patrónum sancta venerátur Ecclésia; tibi trádidit Dóminus ánimas redemptórum in supérna felicitáte locándas. Deprecáre Deum pacis, ut cónterat Sátanam sub pédibus nostris, ne ultra váleat captívos tenére hómines et Ecclésiae nocére. Offer nostras preces in conspéctu Altíssimi, ut cito antícipent nos misericórdiae Dómini, et apprehéndas dracónem, serpéntem antíquum, qui est diábolus et sátanas et ligátum mittas in abýssum, ut non sedúcat ámplius gentes.

Amen.

Note: This prayer was composed by Pope Leo XIII in 1886 and is offered for the private recitation of the faithful in accord with the decree of Inde Ab Aliquot Annis of the Congregation for the Doctrine of the Faith, September 29, 1985.