2 Peter 2:4-5
2 Peter 2:4-5 AMP
For if God did not [even] spare angels that sinned, but threw them into hell and sent them to pits of gloom to be kept [there] for judgment; and if He did not spare the ancient world, but protected Noah, a preacher of righteousness, with seven others, when He brought [the judgment of] a flood upon the world of the ungodly; [Gen 6-8; 1 Pet 3:20]