Mark 9:48
In that place, worms never die, and the fire is never put out.
Isaiah 66:24
"Then they will go out and look upon the dead bodies of the people who rebelled against me. For their worm will not die, nor will their fire be extinguished, and they will remain an object of revulsion to all humanity."
Matthew 25:41
"Then he will say to those on his left, "Get away from me, you who are accursed, into the eternal fire that has been prepared for the Devil and his angels!
Mark 9:43-45
So if your hand causes you to sin, cut it off. It's better for you to enter life injured than to have two hands and go to hell, to the fire that cannot be put out.