Mark 9:48
where their worm dieth not, and the fire is not quenched.
Matthew 25:41
Then will he say also to those on the left hand, Depart from me, ye cursed, into the everlasting fire, which is prepared for the Devil and his angels.
Mark 9:43-45
And if thy hand cause thee to fall away, cut it off. It is better for thee to enter into life maimed, than having the two hands to go away into hell, into the fire that is unquenchable.