Revelation 2:14-16

14But I have a few things against you: You have some people there who follow the teaching of Balaam, who instructed Balak to put a stumbling block before the people of Israel so they would eat food sacrificed to idols and commit sexual immorality.

15In the same way, there are also some among you who follow the teaching of the Nicolaitans.

16Therefore, repent! If not, I will come against you quickly and make war against those people with the sword of my mouth.