Revelation 2:14-15

14But I have a few things to say against you. Some people among you agree with what Balaam taught long ago. He taught Balak to do a bad thing against God's people. Balak caused the Israelite people to do wrong things. As a result, they ate food that people had given to idols. They also had sex with people who were not their husbands or wives.

15Also, some people among you do the bad things that the Nicolaitans teach.