Isaiah 66:24

24“And they shall go out and look on the dead bodies of the men who have rebelled against me. For atheir worm shall not die, btheir fire shall not be quenched, and they shall be an abhorrence to all flesh.”

Mark 9:43-49

43 cAnd if your hand causes you to sin, cut it off. It is better for you to enter life crippled than with two hands to go to dhell,
Greek Gehenna; also verse 47
to fthe unquenchable fire.
Some manuscripts add verses 44 and 46 (which are identical with verse 48)
45 hAnd if your foot causes you to sin, cut it off. It is better for you to enter life lame than with two feet to be thrown into ihell. 47 jAnd if your eye causes you to sin, tear it out. It is better for you to enter the kingdom of God with one eye than with two eyes to be thrown into khell, 48where ltheir worm does not die and the fire is not quenched.’ 49For everyone will be salted with fire.
Some manuscripts add and every sacrifice will be salted with salt
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