2 Peter 3:6

“Whereby the world that then was, etc.] The old world, as it is called in (<610205>2 Peter 2:5); and as the Ethiopic version here renders it; the world before the flood, that had stood from the creation 1656 years: being overflowed with water; by the windows of heaven being opened, and the waters over the earth poured down upon it; and by the fountains of the great deep being broken up in it; thus by these waters from above and below, a general inundation was brought upon it; for that the deluge was universal is clear from hence, and from the account by Moses; for as the earth was filled with violence, and all flesh had corrupted its way, God threatened a general destruction, and which was…”

“Whereby--Greek, "By which" (plural). By means of which heavens and earth (in respect to the WATERS which flowed together from both) the then world perished (that is, in respect to its occupants, men and animals, and its then existing order: not was annihilated); for in the flood "the fountains of the great deep were broken up" from the earth (1) below, and "the windows of heaven" (2) above "were opened." The earth was deluged by that water out of which it had originally risen.”

“Whereby - Δι ̓ ὧν Di' hōn. Through which, or by means of which. The pronoun here is in the plural number, and there has been much difference of opinion as to what it refers. Some suppose that it refers to the heavens mentioned in the preceding verse, and to the fact that the windows of heaven were opened in the deluge (Doddridge), others that the Greek phrase is taken in the sense of (διὸ dio) “whence.” Wetstein supposes that it refers to the “heavens and the earth.” But the most obvious reference, though the plural number is used, and the word “water” in the antecedent is in the singular, is to “water.” The fact seems to be that the apostle had the “waters” mentioned in Genesis…”

“Through which - Heaven and earth, the windows of heaven being opened, and the fountains of the great deep broken up. The world that then was - The whole antediluvian race. Being overflowed with water, perished - And the heavens and earth themselves, though they did not perish, yet underwent a great change. So little ground have these scoffers for saying that all things continue as they were from the creation. 2 Peter 3:7”

“Pe2 2:5; Gen 7:10-23, Gen 9:15; Job 12:15; Mat 24:38, Mat 24:39; Luk 17:27 2 Peter 3:7”