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.