Matthew 10:28 - Don't be afraid of those who kill the body, but are not able to kill the soul. Rather, fear him who is able to destroy both soul and body in Gehenna.
Revelation 20:10 - The devil who deceived them was thrown into the lake of fire and sulfur, where the beast and the false prophet are also. They will be tormented day and night forever and ever.
Luke 12:5 - But I will warn you whom you should fear. Fear him, who after he has killed, has power to cast into Gehenna. Yes, I tell you, fear him.
2 Thessalonians 1:9 - who will pay the penalty: eternal destruction from the face of the Lord and from the glory of his might,
Matthew 25:41 - Then he will say also to those on the left hand, `Depart from me, you cursed, into the eternal fire which is prepared for the devil and his angels;