|Easton's Bible Dictionary|
The church at Ephesus (Revelation 2:6) is commended for hating the "deeds" of the Nicolaitanes, and the church of Pergamos is blamed for having them who hold their "doctrines" (15). They were seemingly a class of professing Christians, who sought to introduce into the church a false freedom or licentiousness, thus abusing Paul's doctrine of grace (Comp. 2 Peter 2:15, 16, 19), and were probably identical with those who held the doctrine of Baalam (q.v.), Revelation 2:14.
Nicolaitanes (2 Occurrences)
Revelation 2:6 But this thou hast, that thou hatest the deeds of the Nicolaitanes, which I also hate. (KJV DBY)
Revelation 2:15 So hast thou also them that hold the doctrine of the Nicolaitanes, which thing I hate. (KJV DBY)