Revelation 2:12 in the King James Version
And to the angel of the church in Pergamos write; These things saith he which hath the sharp sword with two edges;
Context
11 He who has an ear, let him hear what the Spirit says to the assemblies. He who overcomes won’t be harmed by the second death.
12 “To the angel of the assembly in Pergamum write: “He who has the sharp two-edged sword says these things:
13 “I know your works and where you dwell, where Satan’s throne is. You hold firmly to my name, and didn’t deny my faith in the days of Antipas my witness, my faithful one, who was killed among you, where Satan dwells.