Revelation 2:11
He that has an ear, let him hear what the Spirit said to the churches; He that overcomes shall not be hurt of the second death.
Torrey's Topical Textbook—AKJV

Revelation 21:8
But the fearful, and unbelieving, and the abominable, and murderers, and fornicators, and sorcerers, and idolaters, and all liars, shall have their part in the lake which burns with fire and brimstone: which is the second death.
Torrey's Topical Textbook—AKJV