Council of Trent: Session XIV, On The Most Holy Sacrament Of Penance, Canon IV

ON THE MOST HOLY SACRAMENT OF PENANCE

CANON IV.--If any one denieth, that, for the entire and perfect remission of sins, there are required three acts in the penitent, which are as it were the matter of the sacrament of Penance, to wit, contrition, confession, and satisfaction, which are called the three parts of penance; or saith that there are two parts only of penance, to wit, the terrors with which the conscience is smitten upon being convinced of sin, and the faith, generated by the gospel, or by the absolution, whereby one believes that his sins are forgiven him through Christ; let him be anathema.

Translation: J. Waterworth, The Canons and Decrees of the Council of Trent (1848), Hanover Historical Texts Project transcription (1995).