The Roman Missal: Proper of Saints, September (English) 20

1[September 24. Feast of the most Blessed Virgin Mary of Mercy.—Greater Double.]
2[Mass.—Salve, as at page LXXII, except—]
3Prayer. Deus qui per. O God, who by the most glorious Mother of thy Son, didst vouchsafe to increase thy Church by a new order for the deliverance of the faithful of Christ from the power of pagans; grant, we beseech thee, that by the merits and intercession of her, whom we piously venerate as the institutrix of so great a work, we may be delivered from all sins, and from the captivity of the devil. Through the same Lord, &c.
4[Credo is said, and the Preface of the B. V. Mary.]