Matthew 13:49-51
13:49 It will be this way at the end of the age. Angels will come and separate the evil from the righteous
13:50 and
throw them into the fiery furnace,
1 where there will be weeping and gnashing of teeth.
13:51 “Have you understood all these things?” They replied, “Yes.”
1 sn An allusion to Dan 3:6.