Anyone who worships the Beast and receives his 'mark' in their forehead or their hand, is doomed forever and shall be tormented with fire and brimestone in the presence of the Holy Angels and of the Lamb and the smoke of their torment shall ascend forever and ever and they shall have no rest day or night.

        That means during the 3 and a half years of the Antichrist's reign, after they have received the 'mark' because there is no day or night in eternity.