Parallel
Isaiah 66:24
Brenton's English Septuagint · Berean Standard Bible
And they shall go forth, and see the carcases of the men that have transgressed against me: for their worm shall not die, and their fire shall not be quenched; and they shall be a spectacle to all flesh.
“As they go forth, they will see the corpses of the men who have rebelled against Me; for their worm will never die, their fire will never be quenched (note: Cited in Mark 9:48), and they will be a horror to all mankind.”