Mark 9:48
where 'their worm does not die, and the fire is not quenched.'
Matthew 25:41
"Then he will say to those on his left hand, 'Depart from me, you who are cursed, into the eternal fire prepared for the devil and his angels:
Mark 9:43-45
If your hand causes you to sin, cut it off. It is better for you to enter life maimed than with two hands to go into hell, to the fire that shall never be quenched.