“If anyone was not found written in the book of life, he was cast into the lake of fire.”
Revelation 20:15 (WEB)
Context Reading
13The sea gave up the dead who were in it. Death and Hadesgave up the dead who were in them. They were judged, each one according to his works. 14Death and Hadeswere thrown into the lake of fire. This is the second death, the lake of fire. 15If anyone was not found written in the book of life, he was cast into the lake of fire.