Matthew 25:41, 46 - "Then he will say to those on his left, 'Depart from me, you who are cursed, into the eternal fire prepared for the devil and his angels." ..."Then they will go away to eternal punishment, but the righteous to eternal life."
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.
Mark 9:48 - (Hell) where 'their worm does not die, and the fire is not quenched.' Everyone will be salted with fire.
Revelation 20:10-15 (NAS) - And the devil, who deceived them, was thrown into the lake of burning sulfur, where the beast and the false prophet had been thrown. They will be tormented day and night for ever and ever. Then I saw a great white throne and him who was seated on it. Earth and sky fled from his presence, and there was no place for them. And I saw the dead, great and small, standing before the throne, and books were opened. Another book was opened, which is the book of life. The dead were judged according to what they had done as recorded in the books. 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.