XVI. (15) Their falsified copies of the Scriptures, and their apocryphal books prohibited.
And on this subject your remarks under the fifteenth head make a complaint, and express a well-deserved abhorrence of their devilish presumption, for we too have ascertained this from the accounts of trustworthy witnesses, and have found many of their copies most corrupt, though they are entitled canonical. For how could they deceive the simple-minded unless they sweetened their poisoned cups with a little honey, lest what was meant to be deadly should be detected by its over-nastiness?
Therefore care must be taken, and the priestly diligence exercised to the uttermost, to prevent falsified copies that are out of harmony with the pure Truth being used in reading. And the apocryphal scriptures, which, under the names of Apostles, form a nursery-ground for many falsehoods, are not only to be proscribed, but also taken away altogether and burnt to ashes in the fire. For although there are certain things in them which seem to have a show of piety, yet they are never free from poison, and through the allurements of their stories they have the secret effect of first beguiling men with miraculous narratives, and then catching them in the noose of some error.
Wherefore if any bishop has either not forbidden the possession of apocryphal writings in men's houses, or under the name of being canonical has suffered those copies to be read in church which are vitiated with the spurious alterations of Priscillian, let him know that he is to be accounted heretic, since he who does not reclaim others from error shows that he himself has gone astray.
Source: Letters (New Advent)