The verses come from the ritual, Of Exorcisms and Certain Supplications, an 84-page document of the Catholic Church describing the rite of exorcism. It was revised on 26 January 1998, making it the last liturgical book to be revised following the Second Vatican Council of 1962-1965.
The priest says: “I command you, unclean spirit, whoever you are, along with all your minions now attacking this servant of God, by the mysteries of the incarnation, passion, resurrection and ascension of our Lord Jesus Christ, by the descent of the Holy Spirit, by the coming of our Lord for judgment, that you tell me by some sign your name, and the day and hour of your departure. I command you, moreover, to obey me to the letter, I who am a minister of God despite my unworthiness; nor shall you be emboldened to harm in any way this creature of God, or the bystanders, or any of their possessions.
Depart, then, transgressor. Depart, seducer, full of lies and cunning, foe of virtue, persecutor of the innocent. Give place, abominable creature, give way, you monster, give way to Christ, in whom you found none of your works. For he has already stripped you of your powers and laid waste your kingdom, bound you prisoner and plundered your weapons. He has cast you forth into the outer darkness, where everlasting ruin awaits you and your abettors.