By faith Noah, being warned of God of things not seen as yet, moved with fear, prepared an ark to the saving of his house; by the which he condemned the world, and became heir of the righteousness which is by faith. Hebrews 11:7

Noah preached repentance, and as many as obeyed were saved… The ministers of the grace of God have, by the Holy Spirit, spoken of repentance; and the Lord of all things has himself declared with an oath regarding it, “As I live, says the Lord, I desire not the death of the sinner, but rather his repentance;” Clement of Rome (A.D. 96) ch. 7

Noah, being found faithful, preached a second birth to the world through his ministry; and the Lord saved by him the animals which, with one accord, entered into the ark. Clement of Rome (A.D. 96) ch.9

"You know, then, sirs," I said, "that God has said in Isaiah to Jerusalem: 'I saved you in the deluge of Noah.' By this which God said was meant that the mystery of saved men appeared in the deluge. For righteous Noah, along with the other mortals at the deluge, i.e., with his own wife, his three sons and their wives, being eight in number, were a symbol of the eighth day, wherein Christ appeared when He rose from the dead, forever the first in power. For Christ, being the first-born of every creature, became again the chief of another race regenerated by Himself through water, and faith, and wood, containing the mystery of the cross; even as Noah was saved by wood when he rode over the waters with his household. Justin Martyr (A.D. 160) Ante-Nicene Fathers vol.1 pg.268

But the whole earth, as the Scripture says, was inundated, and the water rose in height fifteen cubits above all the mountains: so that it is evident this was not spoken to the land, but to the people who obeyed Him: for whom also He had before prepared a resting-place in Jerusalem, as was previously demonstrated by all the symbols of the deluge; I mean, that by water, faith, and wood, those who are afore-prepared, and who repent of the sins which they have committed, shall escape from the impending judgment of God. Justin Martyr (A.D. 160) Ante-Nicene Fathers vol.1 pg.268

For another mystery was accomplished and predicted in the days of Noah, of which you are not aware. It is this: in the blessings wherewith Noah blessed his two sons, and in the curse pronounced on his son's son… And listen to the way in which it has so come to pass. For you (the Jews), who have derived your lineage from Shem, invaded the territory of the sons of Canaan by the will of God; and you possessed it. And it is manifest that the sons of Japheth, having invaded you in turn by the judgment of God, have taken your land from you, and have possessed it. Thus it is written: 'And Noah awoke from the wine, and knew what his younger son had done unto him; and he said, Cursed be Canaan, the servant; a servant shall he be unto his brethren. And he said, Blessed be the Lord God of Shem; and Canaan shall be his servant. May the Lord enlarge Japheth, and let him dwell in the houses of Shem; and let Canaan be his servant.' Accordingly, as two peoples were blessed - those from Shem, and those from Japheth - and as the offspring of Shem were decreed first to possess the dwellings of Canaan, and the offspring of Japheth were predicted as in turn receiving the same possessions, and to the two peoples there was the one people of Canaan handed over for servants; so Christ has come according to the power given Him from the Almighty Father. Justin Martyr (A.D. 160) Ante-Nicene Fathers vol.1 pg.269

And in the days of Noah He justly brought on the deluge for the purpose of extinguishing that most infamous race of men then existent, who could not bring forth fruit to God, since the angels that sinned had commingled with them, and [acted as He did] in order that He might put a check upon the sins of these men, but [that at the same time] He might preserve the archetype, the formation of Adam. And it was He who rained fire and brimstone from heaven, in the days of Lot, upon Sodom and Gomorrah, "an example of the righteous judgment of God," that all may know, "that every tree that brings not forth good fruit shall be cut down, and cast into the fire." Irenaeus (A.D. 180) Ante-Nicene Fathers vol.1 pg. 516

I am aware that the Scripture of Enoch, which has assigned this order (of action) to angels, 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 silent alike concerning the disposition (of things) made by God, his Preserver, and concerning the particular glory of his own house. Tertullian (A.D. 198) Ante-Nicene Fathers vol.4 pg.15