The devil … was thrown into the lake of fire and sulphur: he joins the beast and the false prophet in the place of eternal punishment (see 19.20).

They will be tormented day and night for ever and ever: for the verb be tormented see 14.10; and for the expression indicating eternity, see 14.11.

An alternative translation model for languages that do not use the passive is the following:

• Then they threw the Devil, who deceived all these people, into the place that burns with fiery sulfur, where they had already thrown the beast and the false prophet. The fire will torment all of them day and night for ever.

Quoted with permission from Bratcher, Robert G. and Hatton, Howard A. A Handbook on The Revelation to John. (UBS Handbook Series). New York: UBS, 1993. For this and other handbooks for translators see here .