Jude 1:11

Woe to them, because they went in the way of Cain, and rushed on in the error of Balsam for hire, and perished in the gainsaying of Korah!

Revelation 2:14

But I have a few things against you, because you have there those holding the teaching of Balaam, who taught Balak to cast a stumbling-block before the sons of Israel, to eat idol-sacrifices, and to commit fornication.

2 Peter 2:15-16

leaving the right way, they were led astray, having followed 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
leaving the right way, they were led astray, having followed the way of Balaam, the son of Beor, who loved the wages of unrighteousness,
Revelation 2:14
But I have a few things against you, because you have there those holding the teaching of Balaam, who taught Balak to cast a stumbling-block before the sons of Israel, to eat idol-sacrifices, and to commit fornication.