Roman Catechism 39.35

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

Section 35. Those, therefore, on whom injuries have been inflicted, should be ready and willing to pardon, urged to it as they are by this form of prayer, and by the command of God in St. Luke: If thy brother sin against thee, reprove him; and if he repent, forgive him; and if he sin against thee seven times in a day, and seven times in a day turn again to thee, saying, "I repent," forgive him. In the Gospel of St. Matthew we read: Love your enemies; and the Apostle, and before him Solomon wrote: If thy enemy be hungry, give him to eat; if he thirst, give him to drink; and finally we read in the Gospel of St. Mark: When you shall stand to pray, forgive if you have anything against any man; that your Father also who is in heaven may forgive you your sins.