Revelation 2:14

But I have a few things against you, because you have there some who hold the teaching of Balaam, who taught Balak to throw a stumbling block before the children of Israel, to eat things sacrificed to idols, and to commit sexual immorality.

Revelation 2:20

But I have this against you, that you tolerate the woman, Jezebel, who calls herself a prophetess. She teaches and seduces my servants to commit sexual immorality, and to eat things sacrificed to idols.

2 Peter 2:15

forsaking the right way, they went astray, having followed the way of Balaam the son of Beor, who loved the wages of wrongdoing;

Numbers 31:16

Behold, these caused the children of Israel, through the counsel of Balaam, to commit trespass against the LORD in the matter of Peor, and so the plague was among the congregation of the LORD.

Acts 15:29

that you abstain from things sacrificed to idols, from blood, from things strangled, and from sexual immorality, from which if you keep yourselves, it will be well with you. Farewell."

Numbers 24:14

Now, behold, I go to my people: come, I will inform you what this people shall do to your people in the latter days."

Numbers 25:1-3

Israel stayed in Shittim; and the people began to play the prostitute with the daughters of Moab:

Numbers 31:8

They killed the kings of Midian with the rest of their slain: Evi, and Rekem, and Zur, and Hur, and Reba, the five kings of Midian: Balaam also the son of Beor they killed with the sword.

Joshua 24:9

Then Balak the son of Zippor, king of Moab, arose and fought against Israel. He sent and called Balaam the son of Beor to curse you;

Isaiah 57:14

He will say, "Build up, build up, prepare the way, take up the stumbling-block out of the way of my people."

Jeremiah 6:21

Therefore thus says the LORD, 'Behold, I will lay stumbling blocks before this people. The fathers and the sons together shall stumble against them. The neighbor and his friend shall perish.'

Ezekiel 3:20

"Again, when a righteous man does turn from his righteousness, and commit iniquity, and I lay a stumbling block before him, he shall die: because you have not given him warning, he shall die in his sin, and his righteous deeds which he has done shall not be remembered; but his blood will I require at your hand.

Ezekiel 44:12

Because they ministered to them before their idols, and became a stumbling block of iniquity to the house of Israel; therefore have I lifted up my hand against them, says the Lord GOD, and they shall bear their iniquity.

Matthew 18:7

"Woe to the world because of stumbling blocks. For there will always be something to cause people to stumble, but woe to the person through whom the stumbling block comes.

Acts 15:20-21

but that we write to them that they abstain from the pollution of idols, from sexual immorality, from what is strangled, and from blood.

Acts 21:25

But concerning the Gentiles who believe, we have written our decision that they should keep themselves from food offered to idols, from blood, from strangled things, and from sexual immorality."

Romans 9:32

Why? Because they did not seek it by faith, but as it were by works. They stumbled over the stumbling stone;

Romans 11:9

David says, "Let their table be made a snare, and a trap, a stumbling block, and a retribution to them.

Romans 14:13

Therefore let us not judge one another any more, but judge this rather, that no man put a stumbling block in his brother's way, or an occasion for falling.

Romans 14:21

It is good to not eat meat, drink wine, nor do anything by which your brother stumbles.

1 Corinthians 1:23

but we preach Christ crucified, a stumbling block to Jews and foolishness to Gentiles,

1 Corinthians 6:13-18

"Foods for the belly, and the belly for foods," but God will bring to nothing both it and them. But the body is not for sexual immorality, but for the Lord; and the Lord for the body.

1 Corinthians 7:2

But, because of sexual immoralities, let each man have his own wife, and let each woman have her own husband.

1 Corinthians 8:4-13

Therefore concerning the eating of things sacrificed to idols, we know that no idol is anything in the world, and that there is no God but one.

1 Corinthians 10:18-31

Consider Israel according to the flesh. Do not those who eat the sacrifices participate in the altar?

Hebrews 13:4

Let marriage be held in honor among all, and let the bed be undefiled: for God will judge the sexually immoral and adulterers.

1 Peter 2:8

and, "a stone of stumbling, and a rock of offense." For they stumble at the word, being disobedient, to which also they were appointed.

Jude 1:11

Woe to them. For they went in the way of Cain, and ran riotously in the error of Balaam for profit, and perished in Korah's rebellion.

Revelation 2:4

But I have this against you, that you left your first love.

Revelation 21:8

But for the cowardly, unbelieving, abominable, murderers, sexually immoral, sorcerers, idolaters, and all liars, their part is in the lake that burns with fire and sulfur, which is the second death."

Revelation 22:15

Outside are the dogs, the sorcerers, the sexually immoral, the murderers, the idolaters, and everyone who loves and practices falsehood.

Treasury of Scripture Knowledge

Summary

But I have a few things against thee, because thou hast there them that hold the doctrine of Balaam, who taught Balac to cast a stumblingblock before the children of Israel, to eat things sacrificed unto idols, and to commit fornication.

Bible References

I have

Revelation 2:4
But I have this against you, that you left your first love.

A stumbling-block

Isaiah 57:14
He will say, "Build up, build up, prepare the way, take up the stumbling-block out of the way of my people."
Jeremiah 6:21
Therefore thus says the LORD, 'Behold, I will lay stumbling blocks before this people. The fathers and the sons together shall stumble against them. The neighbor and his friend shall perish.'
Ezekiel 3:20
"Again, when a righteous man does turn from his righteousness, and commit iniquity, and I lay a stumbling block before him, he shall die: because you have not given him warning, he shall die in his sin, and his righteous deeds which he has done shall not be remembered; but his blood will I require at your hand.
Ezekiel 44:12
Because they ministered to them before their idols, and became a stumbling block of iniquity to the house of Israel; therefore have I lifted up my hand against them, says the Lord GOD, and they shall bear their iniquity.
Matthew 18:7
"Woe to the world because of stumbling blocks. For there will always be something to cause people to stumble, but woe to the person through whom the stumbling block comes.
Romans 9:32
Why? Because they did not seek it by faith, but as it were by works. They stumbled over the stumbling stone;
Romans 11:9
David says, "Let their table be made a snare, and a trap, a stumbling block, and a retribution to them.
Romans 14:13
Therefore let us not judge one another any more, but judge this rather, that no man put a stumbling block in his brother's way, or an occasion for falling.
1 Corinthians 1:23
but we preach Christ crucified, a stumbling block to Jews and foolishness to Gentiles,
1 Corinthians 8:9
But be careful that by no means does this liberty of yours become a stumbling block to the weak.
1 Peter 2:8
and, "a stone of stumbling, and a rock of offense." For they stumble at the word, being disobedient, to which also they were appointed.

Eat

Revelation 2:20
But I have this against you, that you tolerate the woman, Jezebel, who calls herself a prophetess. She teaches and seduces my servants to commit sexual immorality, and to eat things sacrificed to idols.
Acts 15:20
but that we write to them that they abstain from the pollution of idols, from sexual immorality, from what is strangled, and from blood.
Acts 21:25
But concerning the Gentiles who believe, we have written our decision that they should keep themselves from food offered to idols, from blood, from strangled things, and from sexual immorality."
1 Corinthians 8:4
Therefore concerning the eating of things sacrificed to idols, we know that no idol is anything in the world, and that there is no God but one.
1 Corinthians 10:18
Consider Israel according to the flesh. Do not those who eat the sacrifices participate in the altar?

To commit

Revelation 21:8
But for the cowardly, unbelieving, abominable, murderers, sexually immoral, sorcerers, idolaters, and all liars, their part is in the lake that burns with fire and sulfur, which is the second death."
Revelation 22:15
Outside are the dogs, the sorcerers, the sexually immoral, the murderers, the idolaters, and everyone who loves and practices falsehood.
1 Corinthians 6:13
"Foods for the belly, and the belly for foods," but God will bring to nothing both it and them. But the body is not for sexual immorality, but for the Lord; and the Lord for the body.
1 Corinthians 7:2
But, because of sexual immoralities, let each man have his own wife, and let each woman have her own husband.
Hebrews 13:4
Let marriage be held in honor among all, and let the bed be undefiled: for God will judge the sexually immoral and adulterers.

General references

Deuteronomy 27:18
'Cursed is he who makes the blind to wander out of the way.' All the people shall say, 'Amen.'
Isaiah 28:23
Give ear, and hear my voice. Listen, and hear my speech.
1 Corinthians 10:8
Neither let us commit sexual immorality, as some of them committed, and in one day twenty-three thousand fell.