6 through which the world at that time perished, having been deluged with water.
2 Peter 3:6 Cross References - BLB
Matthew 24:38-39
Luke 17:27
27 They were eating, they were drinking, they were marrying, they were being given in marriage, until that day Noah entered into the ark, and the flood came and destroyed all.
2 Peter 2:5
5 and He did not spare the ancient world, but preserved Noah, a herald of righteousness, one of eight, having brought the flood upon the world of the ungodly;