Bible. Lake of fire
That is the second death
7 He that overcometh shall inherit all things; and I will be his God, and he shall be my son. Heb 8, 10.
8 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 (ἐν τῇ λίμνῃ τῇ καιομένῃ πυρὶ καὶ θείῳ): which is the second death (ὅ ἐστιν δεύτερος θάνατος). 1Co 6, 9. Gal 5, 19-21.
7 And when the thousand years are expired, Satan shall be loosed out of his prison, Eze 38, 2. Eze 39, 1. Rev 16, 14.
8 And shall go out to deceive the nations which are in the four quarters of the earth, Gog and Magog, to gather them together to battle: the number of whom is as the sand of the sea.
9 And they went up on the breadth of the earth, and compassed the camp of the saints about, and the beloved city: and fire came down from God out of heaven (κατέβη πῦρ ἀπὸ τοῦ Θεοῦ ἐκ τοῦ οὐρανοῦ), and devoured them. Isa 66, 24. Rev 14, 10.
10 And the devil that deceived them was cast into the lake of fire and brimstone (εἰς τὴν λίμνην τοῦ πυρὸς καὶ θείου), where the beast and the false prophet are, and shall be tormented day and night for ever and ever. Dan 7, 11. Rev 19, 20.
11 And I saw a great white throne, and him that sat on it, from whose face the earth and the heaven fled away; and there was found no place for them. 2Pe 3, 10.
12 And I saw the dead, small and great, stand before God; and the books were opened: and another book was opened, which is the book of life: and the dead were judged out of those things which were written in the books, according to their works. Rev 2, 23. Rev 3, 5. Rev 13, 8. Rev 21, 27.
13 And the sea gave up the dead which were in it; and death and hell delivered up the dead which were in them: and they were judged every man according to their works.
14 And death and hell were cast into the lake of fire (εἰς τὴν λίμνην τοῦ πυρός). This is the second death (οὗτος ἐστιν ὁ δεύτερός θάνατος). 1Co 15, 26. Rev 2, 11.
15 And whosoever was not found written in the book of life was cast into the lake of fire.