I know [about] your suffering and your poverty (but you are [really] rich), and the slander of those who say they are Jews, though they [really] are not, but are a synagogue of Satan [i.e., they claimed to be an assembly of God's people, but in reality were serving Satan].

For they are spirits of demons, which perform [supernatural] signs. These spirits go out to the kings of the whole world to assemble them for battle on the great day of Almighty God.

and he will [again] go out to deceive the nations which are [located] throughout the whole world --- Gog and Magog. [Note: Based on Eze. 35-40, it appears that these names are used here figuratively for all the forces of wickedness which are enemies of God]. Satan will assemble them together for battle, and they will be as numberless as the sand on the seashore.