Revelation 2:12-17 (NRSV)
Idolatrous behavior is condemned
"And to the angel of the church in Pergamum write: These are the words of him who has the sharp two edged sword:
"I know where you are living, where Satan's throne is. Yet you are holding fast to my name, and you did not deny your faith in me even in the days of Antipas my witness, my faithful one, who was killed among you, where Satan lives. But I have a few things against you: you have some there who hold to the teaching of Balaam, who taught Balak to put a stumbling block before the people of Israel, so that they would eat food sacrificed to idols and practice fornication. So you also have some who hold to the teaching of the Nicolaitans. Repent then. If not, I will come to you soon and make war against them with the sword of my mouth. Let anyone who has an ear listen to what the Spirit is saying to the churches. To everyone who conquers I will give some of the hidden manna, and I will give a white stone, and on the white stone is written a new name that no one knows except the one who receives it.