2 Peter 3:4-8

3:4 and saying, “Where is his promised return? For ever since our ancestors died, all things have continued as they were from the beginning of creation.” 3:5 For they deliberately suppress this fact, that by the word of God heavens existed long ago and an earth was formed out of water and by means of water. 3:6 Through these things the world existing at that time was destroyed when it was deluged with water. 3:7 But by the same word the present heavens and earth have been reserved for fire, by being kept for the day of judgment and destruction of the ungodly.

3:8 Now, dear friends, do not let this one thing escape your notice, that a single day is like a thousand years with the Lord and a thousand years are like a single day.