Roman Catechism 39.45

Chapter 39 — Part IV: Prayer — The Fifth Petition: Forgive Us Our Trespasses as We Forgive Those Who Trespass Against Us

Section 45. Those, therefore, who are troubled by that groundless and perverse fear, that by this prayer they provoke still more the wrath of God, should be undeceived and should be exhorted to make frequent use of a prayer in which they beseech God our Father to grant them the disposition to forgive those who have injured them and to love their enemies.