Malachi 4:1

For, behold, the day cometh, the entire New Testament period being considered a day of sifting and of judgment, because it culminates in the Day of Judgment, that shall burn as an oven, one which holds the refiner's fire; and all the proud, yea, and all that do wickedly, shall be stubble, under the fire of His wrath, Cf Matthew 3:10; and the day that cometh shall burn them up, saith the Lord of hosts, Cf Isaiah 5:24; Zephaniah 1:18, that it shall leave them neither root nor branch, the final, eternal destruction of the wicked being coincidental with the last Judgment. Such is the terrible fate of those who do not avail themselves of the Lord's mercy.