Jude 1:11

Alas for them! for they have gone in the way of Cain: and, in the error of Balaam, they have rushed headlong after reward, and have perished in the rebellion of Korah.

Revelation 2:14

Yet I have a few things against you, that you have there those who hold the teaching of Balaam, who taught Balak to put a stumbling-block before the sons of Israel, to eat things sacrificed to idols, and to practice lewdness.

2 Peter 2:15-16

who have forsaken the right way and gone astray, following the way of Balaam the son of Beor, who loved the wages of unrighteousness;

Treasury of Scripture Knowledge

Summary

He sent messengers therefore unto Balaam the son of Beor to Pethor, which is by the river of the land of the children of his people, to call him, saying, Behold, there is a people come out from Egypt: behold, they cover the face of the earth, and they abide over against me:

Bible References

Sent

2 Peter 2:15
who have forsaken the right way and gone astray, following the way of Balaam the son of Beor, who loved the wages of unrighteousness;
Revelation 2:14
Yet I have a few things against you, that you have there those who hold the teaching of Balaam, who taught Balak to put a stumbling-block before the sons of Israel, to eat things sacrificed to idols, and to practice lewdness.