Rev. 20:10 - And the devil who had deceived them was thrown into the lake of fire and sulfur, into which the beast and the false prophet had already been thrown.
Clue: Lake of fire and sulfur
Evidence:
Sulfur
In our own Solar System, sulfur compounds arc not only surprisingly common, but often play key roles in planetary processes. Besides the high level of sulfur in the Sun and widespread and diverse occurrences on Earth, the Venusian atmosphere is laden with sulfuric acid aerosol droplets-in Spite of original expectations (Lewis, 1972) that sulfur would not accrete as condensed compounds at or within the orbits of Venus and Mercury.