The day of God will come with fire (2 Pet 2:21)

2 Peter is a letter ascribed to the apostle Peter. The author recalls how he heard the voice of God when Jesus was transfigured on the mountain, and he warns against false prophets who lead people astray; such prophets will be punished by God. Although some scoff at the idea that the Lord will return, the author says that with God "a thousand years are like one day" (3:8). The Lord will keep his promise, coming like a thief in the night. His delay in returning allows people time to repent.

2 Pet 3:8-10 - The coming of the Lord