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.

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:

1 John 3:12

not as Cain was of the evil one, and slew his brother; and on account of what did he slay him? Because his own works were evil, and those of his brother righteous.

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.

Matthew 11:21

Woe unto thee, Chorazin! Woe unto thee, Bethsaida! because if the mighty works which were wrought in you had been in Tyre and Sidon, they would have repented long ago in sackcloth and ashes.

Matthew 23:13-16

But woe unto you, scribes and Pharisees, hypocrites! because you shut up the kingdom of the heavens against the people: for you do not go in, neither do you permit those coming in to enter.

Luke 11:42-47

But woe unto you, Pharisees! because you tithe mint and rue and every herb, and you pass by judgment and the love of God: it behooveth to do these things, and not to omit those.

Hebrews 11:4

By faith Abel offered up to God a more acceptable sacrifice than Cain, through which he received the witness that he was righteous, God witnessing to his gifts: and through it he having died is still speaking.

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
not as Cain was of the evil one, and slew his brother; and on account of what did he slay him? Because his own works were evil, and those of his brother righteous.

Ran

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.