Revelation 2:6
Yet this you have in your favor: you hate the doings of the Nicolaitans, which I also hate.
2 John 1:9-10
No one has God, who instead of remaining true to the teaching of Christ, presses on in advance: but he who remains true to that teaching has both the Father and the Son.
Revelation 2:14-15
Yet I have a few things against you, because you have with you some that cling to the teaching of Balaam, who taught Balak to put a stumbling-block in the way of the descendants of Israel--to eat what had been sacrificed to idols, and commit fornication.
Treasury of Scripture Knowledge
Summary
                            But this thou hast, that thou hatest the deeds of the Nicolaitans, which I also hate.                        
                    Bible References
That
                                        Revelation 2:14                                        
                                                                                                                                Yet I have a few things against you, because you have  with you some that cling to the teaching of Balaam, who taught Balak to put a stumbling-block in the way of the descendants of Israel--to eat what had been sacrificed to idols, and commit fornication.
                                    
                                        2 John 1:9                                        
                                                            
                        No one has God, who instead of remaining true to the  teaching of Christ, presses on in advance: but he who remains true to that teaching has both the Father and the Son.