Tertullian on the Reliability of the Book of Enoch in 198CE

I am aware that the Scripture of Enoch… is not received by some, because it is not admitted into the Jewish canon either. I suppose they did not think that, having been published before the deluge, it could have safely survived that world-wide calamity, the abolisher of all things. If that is the reason (for rejecting it), let them recall to their memory that Noah, the survivor of the deluge, was the great-grandson of Enoch himself.

And he, of course, had heard and remembered from domestic renown and hereditary tradition concerning his own great-grandfather’s “grace in the sight of God,” and concerning all his preachings; since Enoch had given no other charge to Methuselah than that he should hand on the knowledge of them to his posterity. Noah therefore, no doubt, might have succeeded in the trusteeship of (his) preaching; or, had the case been otherwise, he would not have been similarly silent concerning the disposition (of things) made by God, his Preserver, and concerning the particular glory of his own house. …

But since Enoch in the same Scripture has preached likewise concerning the Lord, nothing at all must be rejected by us which pertains to us; and we read that “every Scripture suitable for edification is divinely inspired.” By the Jews it may now seem to have been rejected for that (very) reason, just like all the other (portions) nearly which tell of Christ. … To these considerations is added the fact that Enoch possesses a testimony in the Apostle Jude.

Commodianus on Inter-dimensional Visitors Before the Days of Noah in 260CE

In the law, the Lord of heaven and earth and sea has commanded, saying, “Worship not vain gods made by your own hands out of wood or gold, lest My wrath destroy you for such things.” The people before Moses, unskilled, living without law, and ignorant of God, prayed to gods that perished, after the likenesses of which they fashioned vain idols. The Lord having brought the Jews out of the land of Egypt, subsequently imposed on them a law; and the Omnipotent enjoined these things, that they should serve Him alone, and not those idols. Moreover, in that law is taught concerning the resurrection, and the hope of living in happiness again in the world, if vain idols be forsaken and not worshipped.

When Almighty God, to beautify the nature of the world willed that that earth should be visited by angels, when they were sent down they despised His laws. Such was the beauty of women that it turned them aside; so that, being contaminated, they could not return to heaven. Rebels from God, they uttered words against Him. Then the Highest uttered His judgment against them; and from their seed giants are said to have been born.

By them arts were made known in the earth, and they taught the dyeing of wool, and everything which is done; and to them, when they died, men erected images. But the Almighty, because they were of an evil seed, did not approve that, when dead, they should be brought back from death. From there, wandering, they now subvert many bodies, and it is such as these especially that you this day worship and pray to as gods.