Synagogue of Satan
In Revelation 2:9, the people are called a synagogue because were Jews, and since Jews taught in synagogues, a synagogue symbolizes doctrine. Moreover, because Satan represents hell composed of people caught up in falsities, therefore they are a synagogue of Satan. (Apocalypse Revealed 97)
Numbers 18:22-23
22
Henceforth the children of Israel shall not come near the Tent of Meeting, lest they bear sin, and die.
23
But the Levites shall do the service of the Tent of Meeting, and they shall bear their iniquity: it shall be a statute forever throughout your generations; and among the children of Israel they shall have no inheritance.
