'Eternal Fire' in the Bible

And if thy hand or thy foot give thee cause of offence, cut them off, and cast from thee: it is good for thee to come into life lame or maimed, than having two hands or two feet to be cast into eternal fire.

Then shall he say to them from the left, Go away from me, the cursed, into eternal fire, prepared for the devil and his messengers:

As Sodom and Gomorrha and the cities about them, debauched in like manner to these, and having gone away after other flesh, are set before a sample of eternal fire, enduring punishment.