Jude 1:11
Alas for them; for they have followed in the steps of Cain; for the sake of gain they have rushed on headlong in the evil ways of Balaam; and have perished in rebellion like that of Korah!
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 Peter 2:15-16
Forsaking the straight road, they have gone astray, having eagerly followed in the steps of Balaam, the son of Beor, who was bent on securing the wages of unrighteousness.