Jude 1:11

Wo unto them; for they have gone in the way of Cain, and been carried away by Balaam's error, the love of lucre, and perished as in the contradiction of Korah.

2 Peter 2:15

who have forsaken the right way, and are gone astray, having followed the way of Balaam the son of Bosor, who loved the wages of iniquity;

1 John 3:12

and why did he slay him? because his own works were evil, and his brother's righteous.

Revelation 2:14

But I have a few things against thee; for thou hast there those that hold the doctrine of Balaam, who taught Balak to cast a stumbling-block before the children of Israel, to eat things sacrificed to idols, and to commit fornication.

Matthew 11:21

Wo unto thee, Chorazin; wo unto thee, Bethsaida: for if the miracles wrought among you had been done in Tyre and Sidon, they would have repented long ago in sackcloth and ashes:

Matthew 23:13-16

But wo unto you scribes and pharisees, hypocrites, who shut up the kingdom of heaven against men: for ye neither go in yourselves, nor suffer those that are entering to go in.

Luke 11:42-47

But wo unto you pharisees, who tithe even your mint, and rue, and all your herbs, and pass by judgement and the love of God: these ought ye to practise and not to omit the others.

Hebrews 11:4

By faith Abel offered unto God a more excellent sacrifice than Cain, by which he obtained the testimony that he was righteous, God bearing witness to his gifts: and by it, though dead, he yet speaketh.

Treasury of Scripture Knowledge

Summary

Woe unto them! for they have gone in the way of Cain, and ran greedily after the error of Balaam for reward, and perished in the gainsaying of Core.

Bible References

For

1 John 3:12
and why did he slay him? because his own works were evil, and his brother's righteous.

Ran

2 Peter 2:15
who have forsaken the right way, and are gone astray, having followed the way of Balaam the son of Bosor, who loved the wages of iniquity;
Revelation 2:14
But I have a few things against thee; for thou hast there those that hold the doctrine of Balaam, who taught Balak to cast a stumbling-block before the children of Israel, to eat things sacrificed to idols, and to commit fornication.