Revelation 20:10, 14
Revelation 20:10 NASB1995
And the devil who deceived them was thrown into the lake of fire and brimstone, where the beast and the false prophet are also; and they will be tormented day and night forever and ever.
Revelation 20:14 NASB1995
Then death and Hades were thrown into the lake of fire. This is the second death, the lake of fire.