Revelation 2:6

But you have it to your credit that you hate what the Nicolaitans are doing, as I do too.

2 John 1:9-10

No one has God, who goes too far and fails to stay by the teaching of Christ. Whoever stays by this teaching has the Father and the Son.

Revelation 2:14-15

Yet I hold it somewhat against you that you have among you some who are clinging to the teaching of Balaam, who taught Balak to set a trap for the children of Israel, to entice them to eat the meat that had been sacrificed to idols and to commit immoral practices.

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 hold it somewhat against you that you have among you some who are clinging to the teaching of Balaam, who taught Balak to set a trap for the children of Israel, to entice them to eat the meat that had been sacrificed to idols and to commit immoral practices.
2 John 1:9
No one has God, who goes too far and fails to stay by the teaching of Christ. Whoever stays by this teaching has the Father and the Son.