Parallel
Mark 9:48
Patriarchal Greek New Testament (1904) · Berean Standard Bible
ὅπου ὁ σκώληξ αὐτῶν οὐ τελευτᾷ καὶ τὸ πῦρ οὐ σβέννυται.
where ‘their worm never dies, and the fire is never quenched (note: Isaiah 66:24).’