Revelation 2:12-13

12“And to the angel (divine messenger) of the church in Pergamum write: These are the words of Him who has and wields the sharp two-edged sword [in judgment]:

13‘I know where you dwell, [a place] where Satan sits enthroned. Yet you are holding fast to My name, and you did not deny My faith even in the days of Antipas, My witness, My faithful one, who was killed (martyred) among you, where Satan dwells.