Bible. Second death
Victorious will not be hurt by the second death
8 And unto the angel of the church in Smyrna write; These things saith the first and the last, which was dead, and is alive; Isa 41, 4. Isa 44, 6. Isa 48, 12.
9 I know thy works, and tribulation, and poverty, (but thou art rich) and I know the blasphemy of them which say they are Jews, and are not, but are the synagogue of Satan. Luk 6, 20. Jas 2, 5. Rom 2, 29.
10 Fear none of those things which thou shalt suffer: behold, the devil shall cast some of you into prison, that ye may be tried; and ye shall have tribulation ten days: be thou faithful unto death, and I will give thee a crown of life. Mat 10, 21.
11 He that hath an ear, let him hear what the Spirit saith unto the churches; He that overcometh shall not be hurt of the second death. Rev 21, 8.
4 And I saw thrones, and they sat upon them, and judgment was given unto them: and I saw the souls of them that were beheaded for the witness of Jesus, and for the word of God, and which had not worshipped the beast, neither his image, neither had received his mark upon their foreheads, or in their hands; and they lived and reigned with Christ a thousand years. Dan 7, 9, 22. Dan 8, 17. Mat 19, 28. 1Co 6, 2. 2Ti 2, 12. Rev 6, 11.
5 But the rest of the dead lived not again until the thousand years were finished. This is the first resurrection.
6 Blessed and holy is he that hath part in the first resurrection: on such the second death hath no power, but they shall be priests of God and of Christ, and shall reign with him a thousand years. Isa 61, 6. Rev 1, 6. Rev 21, 7.
That is the second death
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. 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.
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: which is the second death (ὅ ἐστιν δεύτερος θάνατος). 1Co 6, 9. Gal 5, 19-21.