Revelation 2:14-17

But I have a few things against you, because you have there some who hold the teaching of Balaam, who kept teaching Balak to put a stumbling block before the sons of Israel, to eat things sacrificed to idols and to commit acts of immorality. So you also have some who in the same way hold the teaching of the Nicolaitans. Therefore repent; or else I am coming to you quickly, and I will make war against them with the sword of My mouth. He who has an ear, let him hear what the Spirit says to the churches. To him who overcomes, to him I will give some of the hidden manna, and I will give him a white stone, and a new name written on the stone which no one knows but he who receives it.’