Jude 1:11

Woe unto them! because they have gone off in the way of Cain, and in the delusion of Balaam they have been seduced by reward, and they perished in the gainsaying of Korah.

Revelation 2:14

But I have a few things against thee, because thou hast there those holding the teachings of Balaam, who taught Balak to cast a stumblingblock before the sons of Israel, and to eat things sacrificed to idols, and to commit fornication.

2 Peter 2:15-16

leaving the straight way, they have wandered off, following in the way of Balaam the son of Bosor, who loved the reward of iniquity; and had the conviction of his own conscience:

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 straight way, they have wandered off, following in the way of Balaam the son of Bosor, who loved the reward of iniquity; and had the conviction of his own conscience:
Revelation 2:14
But I have a few things against thee, because thou hast there those holding the teachings of Balaam, who taught Balak to cast a stumblingblock before the sons of Israel, and to eat things sacrificed to idols, and to commit fornication.