Council of Trent: Session XXII, Sacrifice of the Mass, Chapter IV

CHAPTER IV On the Canon of the Mass.

And whereas it beseemeth, that holy things be administered in a holy manner, and of all holy things this sacrifice is the most holy; to the end that it might be worthily and reverently offered and received, the Catholic Church instituted, many years ago, the sacred Canon, so pure from every error, that nothing is contained therein which does not in the highest degree savour of a certain holiness and piety, and raise up unto God the minds of those that offer. For it is composed, out of the very words of the Lord, the traditions of the apostles, and the pious institutions also of holy pontiffs.

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