Revelation 2:15
So hast thou also them that hold the doctrine of the Nicolaitans, which thing I hate.
Cross-reference
Revelation 2:6
Parallel
In Revelation 2:6, the Nicolaitans are hated by Christ; here they are explicitly named as a false teaching held by some in Pergamum.
Revelation 2:2
Contrast
Revelation 2:2 commends Ephesus for rejecting false apostles — a contrast to Pergamum's tolerance of Nicolaitans.