Revelation 2:13-16

13I know where you live, where the throne of Satan sits, yet you hold fast to My name. You did not deny your faith in Me, even in the days of My faithful witness Antipas, who was killed among you where Satan dwells.

14But I have a few things against you, because some of you hold to the teaching of Balaam, who taught Balak to place a stumbling block before the Israelites so they would eat food sacrificed to idols and commit sexual immorality. 15In the same way, some of you also hold to the teaching of the Nicolaitans. 16Therefore repent! Otherwise I will come to you shortly and wage war against them with the sword of My mouth.