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

ON THE MOST HOLY SACRAMENT OF PENANCE

CANON X.--If any one saith, that priests, who are in mortal sin, have not the power of binding and of loosing; or, that not priests alone are the ministers of absolution, but that, to all and each of the faithful of Christ is it said: Whatsoever you shall bind upon earth shall be bound also in heaven; and whatsoever you shall loose upon earth, shall be loosed also in heaven; and, whose sins you shall forgive, they are forgiven them; and whose sins you shall retain, they are retained; by virtue of which words every one is able to absolve from sins, to wit, from public sins by reproof only, provided he who is reproved yield thereto, and from secret sins by a voluntary confession; let him be anathema.

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