Lake of fire

The Book of Revelation, written some time in the last half of the first century, has five verses that mention a "lake of fire":
 * And the beast was taken, and with him the false prophet that wrought miracles before him, with which he deceived them that had received the mark of the beast, and them that worshipped his image. These both were cast alive into a lake of fire burning with brimstone.
 * And the devil that deceived them was cast into the lake of fire and brimstone, where the beast and the false prophet are, and shall be tormented day and night for ever and ever.
 * "And death and hell were cast into the lake of fire. This is the second death. And whosoever was not found written in the book of life was cast into the lake of fire.
 * But the fearful, and unbelieving, and the abominable, and murderers, and whoremongers, and sorcerers, and idolaters, and all liars, shall have their part in the lake which burneth with fire and brimstone: which is the second death.

A commonly accepted and traditional interpretation is that the "lake of fire" and the "second death" are symbolic of eternal pain, pain of loss and perhaps pain of the senses, as punishment for wickedness.

Jehovah's Witnesses interpret the "lake of fire" and "second death" of the Book of Revelation as referring to a complete and definitive annihilation of those cast into it.