Matthew 25:46

And these shall go away into everlasting punishment, but the righteous into life everlasting — Either therefore the punishment is strictly eternal, or the reward is not: the very same expression being applied to the former as to the latter. The Judge will speak first to the righteous, in the audience of the wicked. The wicked shall then go away into everlasting fire, in the view of the righteous. Thus the damned shall see nothing of the everlasting life; but the just will see the punishment of the ungodly. It is not only particularly observable here, That the punishment lasts as long as the reward; but, That this punishment is so far from ceasing at the end of the world, that it does not begin till then.