Revelation 20:14

14AndκαὶὁDeathθάνατοςandκαὶὁHadesᾅδηςwere castἐβλήθησανintoεἰςtheτὴνlakeλίμνηντοῦof fireπυρός.Thisοὗτοςtheὁdeathθάνατοςὁsecondδεύτερόςisἐστιν,theἡlakeλίμνηofτοῦfireπυρός.

And death and Hades were cast into the lake of fire. This is the second death, the lake of fire.