And the presbyter said this. Mark having become the interpreter of Peter, wrote down accurately whatsoever he remembered. It was not, however, in exact order that he related the sayings or deeds of Christ. For he neither heard the Lord nor accompanied Him. But afterwards, as I said, he accompanied Peter, who accommodated his instructions to the necessities [of his hearers], but with no intention of giving a regular narrative of the Lord’s sayings. Wherefore Mark made no mistake in thus writing some things as he remembered them. For of one thing he took especial care, not to omit anything he had heard, and not to put anything fictitious into the statements. [This is what is related by Papias regarding Mark; but with regard to Matthew he has made the following statements]: Matthew put together the oracles [of the Lord] in the Hebrew language, and each one interpreted them as best he could. [The same person uses proofs from the First Epistle of John, and from the Epistle of Peter in like manner. And he also gives another story of a woman who was accused of many sins before the Lord, which is to be fount in the Gospel according to the Hebrews.
With regard to the inspiration of the book (Revelation), we deem it superfluous to add another word; for the blessed Gregory Theologus and Cyril, and even men of still older date, Papias, Irenaeus, Methodius, and Hippolytus, bore entirely satisfactory testimony to it. – ibid
Clement of Alexandria
As, then, philosophy has been brought into evil repute by pride and self-conceit, so also ghosts by false ghosts called by the same name; of which the apostle writing says, “O Timothy, keep that which is committed to your trust, avoiding the profane and vain babblings and oppositions of science (gnosis) falsely so called; which some professing, have erred concerning the faith.” Convicted by this utterance, the heretics reject the Epistles to Timothy.
The Epistle of Jude, indeed, and two belonging to the above-named John – or bearing the name of John – are reckoned among the Universal epistles. And the book of Wisdom, written by the friends of Solomon in his honor. We receive also the Apocalypse of John and that of Peter, though some amongst us will not have this latter read in the Church. The Pastor, moreover, did Hermas write very recently in our times in the city of Rome, while his brother bishop Pius sat in the chair of the Church of Rome. And therefore it also ought to be read; but it cannot be made public in the Church to the people, nor placed among the prophets, as their number is complete, nor among the apostles to the end of time. Of the writings of Arsinous, called also Valentinus, or of Miltiades, we receive nothing at all. Those are rejected too who wrote the new Book of Psalms for Marcion, together with Basilides and the founder of the Asian Cataphrygians.