2Pet 2:5

“Noah also, uncircumcised-yes, and inobservant of the Sabbath-God freed from the deluge. For Enoch, too, most righteous man, uncircumcised and in-observant of the Sabbath, He translated from this world; who did not first taste death, in order that, being a candidate for eternal life, he might by this time show us that we also may, without the burden of the law of Moses, please God.”

“And spared not the old world,.... In distinction from the present world, that now is; which was, as it were, formed anew out of that which was destroyed by the deluge. The Vulgate Latin version renders it, "the original world"; and the Ethiopic version, "the first world"; it designs the ancient inhabitants of the world, as it was from the beginning, before the flood; who, being wicked, were not spared by God, but had just punishment inflicted on them: but saved Noah the eighth person; not the eighth from Adam, as Enoch is said to be the seventh from him, Jde 1:14 for he was the tenth; nor is it to be read with the following clause, "the eighth preacher of righteousness"; but he was the eighth person, or one of the eight persons, saved from the flood; see Pe1 3:20 hence the Ethiopic version, rather as a paraphrase than a version, renders it, "but caused to remain seven souls with Noah; whom he saved"; Hottinger (p) and Dr. Hammond (q) observe, from the Arabic writers, that the mountain on which the ark rested, and a town near it, were called Themenim; that is, "the eight", from the number of persons then and there saved: a preacher of righteousness; of the righteousness of God, in all his ways and works, and in case he should destroy the world by a flood, as he had threatened; and of civil and moral righteousness among men, both by words, during the building of the ark, and by works, by his own example, in his righteous life and conversation; and of the righteousness of faith, or of Christ, by which he was justified and of which he was an heir, Heb 11:7, the Jews (r) say that Noah was a prophet; and they represent him also, as a preacher, and even tell us the very words he used in his exhortations to the old world (s), saying, "be ye turned from your evil ways and works, lest the waters of the flood come upon you, and cut off all the seed of the children of men:'' but though Noah, a preacher of righteousness, was saved, false teachers cannot expect to escape divine vengeance; who only are transformed as ministers of righteousness, but in truth are ministers of unrighteousness; opposers of the righteousness of Christ, and live unrighteous lives and conversations, and so their end will be according to their works: bringing in the flood upon the world of the ungodly; or "the ungodly of the world", as "the ungodly of the earth" (t); see Psa 75:8 though here it indeed means a whole world of wicked men, all but a very few, which were destroyed by the flood. This expresses both the wickedness of the men of that generation, the imagination of the thoughts of whose heart were evil continually; and whose lives were filled up with uncleanness, violence, rapine, oppression, injustice, and corruption, of all sorts; and likewise the large numbers of them, there was a whole world of them; and yet this did not secure them from the wrath of God, but served to stir it up the more; wherefore false teachers and their followers must not build upon their numbers, or hope to be screened from just punishment on that account; since a world of ungodly men were, for their wickedness, at once swept away, with a flood of God's bringing upon them; causing that very useful and serviceable element of water to be the means of their destruction; for this was not a casual thing, which came of itself, or by chance, but was of God himself, who broke up the fountains of the great deep, and opened the windows of heaven, and destroyed at once all mankind, men, women, and children, and every living creature, excepting what were with Noah in the ark: and since they were persons of such a character as here described, it is not to be thought their punishment is ended here; it is the general notion of the Jews (u), that "the generation of the flood shall have no part in the world to come, nor shall they stand in judgment.'' (p) Smegma Orientale, p. 251, 252. (q) In loc. (r) Aben Ezra in Gen. viii. 21. (s) Pirke Eliezer, c. 22. (t) Targum in Psal. xlvi. 8. (u) Misna Sanhedrin, c. 11. sect. 3. Vajikra Rabba, sect. 4. fol. 149. 1. Yalkut Simeoni, par. 2. fol. 89. 2.”

“Spared not the old world - The apostle's argument is this: If God spared not the rebellious angels, nor the sinful antediluvians, nor the cities of Sodom and Gomorrha, he will not spare those wicked teachers who corrupt the pure doctrines of Christianity. Saved Noah the eighth - Some think that the words should be translated, Noah the eighth preacher of righteousness; but it seems most evident, from Pe1 3:20, that eight persons are here meant, which were the whole that were saved in the ark, viz. Shem, Ham, Japhet, and their three wives, six; Noah's wife seven; and Noah himself the eighth. The form of expression, ογδοον Νωε, Noah the eighth, i.e. Noah and seven more, is most common in the Greek language. So in Appian, Bell. Pun., p. 12, Τριτος δε ποτε εν σπηλαιῳ κρυπτομενος ελαθε, sometimes he the third (i.e. he with two others) lay hid in a cave. Andocides, Orat. iv. p. 295: Αἱρεθεις επι τουτῳ δεκατος αυτος, he himself the tenth (i.e. he and nine others) were chosen to this. See a number of other examples in Kypke. World of the ungodly - A whole race without God - without any pure worship or rational religion.”

“eighth--that is, Noah, and seven others. Contrasted with the densely peopled "world of the ungodly." preacher--not only "righteous" himself (compare Pe2 2:8), but also "a preacher of righteousness": adduced by Peter against the licentiousness of the false teachers (Pe2 2:2) who have no prospect before them but destruction, even as it overtook the ungodly world in Noah's days.”