Revelation 2:6, 13-14

Yet you have this [to your credit], that you hate the works and corrupt teachings of the Nicolaitans [that mislead and delude the people], which I also hate.

‘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. But I have a few things against you, because you have there some [among you] who are holding to the [corrupt] teaching of Balaam, who taught Balak to put a stumbling block before the sons of Israel, [enticing them] to eat things that had been sacrificed to idols and to commit [acts of sexual] immorality. [Num 25:1, 2; 31:16]