Numbers 31:16
Behold, these caused the children of Israel, through the counsel of Balaam, to commit trespass against the LORD in the matter of Peor, and there was a plague among the congregation of the LORD.
Torrey's Topical Textbook—AKJV

Revelation 2:14
But I have a few things against you, because you have there them that hold the doctrine of Balaam, who taught Balac to cast a stumbling block before the children of Israel, to eat things sacrificed to idols, and to commit fornication.
Torrey's Topical Textbook—AKJV