'Eternal Fire' in the Bible

"And, if your hand or your foot causes you to stumble, cut it off, and cast it from you; it is good for you to enter into life maimed or lame, rather than having two hands or two feet to be cast into the eternal fire.

Then will He say also to those on the left hand, 'Depart from Me, ye accursed! into the eternal fire which was prepared for the Devil and his angels;

Even as Sodom and Gomorrah, and the cities about them, having in like manner with these given themselves over to fornication, and going away after other flesh, are set forth as an example, suffering the punishment of eternal fire.