Catechesis: Repentance

Then, just as they redeem purgatory by means of satisfactions, so a scheme was created for redeeming satisfactions, which was most abundant in revenue. They sell indulgences, which they interpret as the pardon of satisfactions. This revenue is not only from the living, but is much more plentiful from the dead. Nor do they redeem the satisfactions of the dead only by indulgences, but also by the sacrifice of the Mass.—Ap XIIA 16