Matthew 13:42
And throw them into the fiery furnace. In that place there will be weeping and gnashing of teeth. The fiery furnace with weeping and gnashing of teeth is Matthew's most vivid image of eschatological judgment — appearing five times in Matthew (8:12, 13:42, 13:50, 22:13, 25:30). The weeping and gnashing communicate the anguish of the excluded: not the peace of annihilation but the grief of irreversible separation.