Didascalicon, Book IV: the order and number of the divine books
Chapter VII. That the rest are apocrypha, and what the apocryphal is
These are the writers of the sacred books, who, speaking by the Holy Spirit, wrote for our instruction the precepts and rule of living. Besides these, other volumes are called apocrypha. They are called apocrypha, that is secret, because they come into doubt. “For their origin is hidden, and is not clear to the Fathers, from whom the authority of the true Scriptures has come down to us by a most certain and well-known succession.” In these apocrypha, although some truth is found, yet because of the many falsehoods there is in them no canonical authority, and it is rightly judged that they are not to be believed to be of those to whom they are ascribed. For many things under the names of the prophets, and more recent ones under the names of the apostles, are put forth by heretics, all of which have been removed by careful examination from canonical authority under the name of apocrypha.