John Wesley on Revelation 2:14

But thou hast there - Whom thou oughtest to have immediately cast out from the flock. Them that hold the doctrine of Balaam - Doctrine nearly resembling his. Who taught Balak - And the rest of the Moabites. To cast a stumblingblock before the sons of Israel - They are generally termed, the children, but here, the sons, of Israel, in opposition to the daughters of Moab, by whom Balaam enticed them to fornication and idolatry. To eat things sacrificed to idols - Which, in so idolatrous a city as Pergamos, was in the highest degree hurtful to Christianity. And to commit fornication - Which was constantly joined with the idol - worship of the heathens.