2 Thessalonians 1:9

"They will be punished with everlasting destruction and shut out from the presence of the Lord and from the majesty of his power"

Revelation 20:10, 13-15

"And the devil, who deceived them, was thrown into the lake of burning sulphur, where the beast and the false prophet had been thrown. They will be tormented day and night for ever and ever.... The sea gave up the dead that were in it, and death and Hades gave up the dead that were in them, and each person was judged according to what he had done. Then death and Hades were thrown into the lake of fire. The lake of fire is the second death. If anyone's name was not found written in the book of life, he was thrown into the lake of fire."

Revelation 21:8

"But the cowardly, the unbelieving, the vile, the murderers, the sexually immoral, those who practise magic arts, the idolaters and all liars--their place will be in the fiery lake of burning sulphur. This is the second death."