2 Peter 3:6 KJV
Whereby the world that then was, being overflowed with water, perished:
2 Peter 3:6, King James Version
In context
5 For this they willingly are ignorant of, that by the word of God the heavens were of old, and the earth standing out of the water and in the water:
6 Whereby the world that then was, being overflowed with water, perished:
7 But the heavens and the earth, which are now, by the same word are kept in store, reserved unto fire against the day of judgment and perdition of ungodly men.