Council of Trent: Session XXIII, Holy Orders, Chapter I

THE TRUE AND CATHOLIC DOCTRINE, TOUCHING THE SACRAMENT OF ORDER, DECREED AND PUBLISHED BY THE HOLY SYNOD OF TRENT, IN THE SEVENTH SESSION, IN CONDEMNATION OF THE ERRORS OF OUR TIME. — CHAPTER I. On the institution of the Priesthood of the New Law.

Sacrifice and priesthood are, by the ordinance of God, in such wise conjoined, as that both have existed in every law. Whereas, therefore, in the New Testament, the Catholic Church has received, from the institution of Christ, the holy visible sacrifice of the Eucharist; it must needs also be confessed, that there is, in that Church, a new, visible, and external priesthood, into which the old has been translated. And the sacred Scriptures show, and the tradition of the Catholic Church has always taught, that this priesthood was instituted by the same Lord our Saviour, and that to the apostles, and their successors in the priesthood, was the power delivered of consecrating, offering, and administering His Body and Blood, as also of forgiving and of retaining sins.

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