The term "second death" occurs four times in the New Testament, specifically in Revelation 2:11, 20:6, 20:14 and 21:8. According to Revelation 2:11 and 20:6, those who overcome the devil's tribulation have part in the first resurrection and will not be hurt by the second death, which has no power over them.
Book of Revelation
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. Then Death and Hades were cast into the lake of fire. This is the second death.
TwiceBorn
OneDeath
Only InJesus