Numbers 25:1-3
While Israel was staying in Shittim, the men began to indulge in sexual immorality with the daughters of Moab, / who also invited them to the sacrifices for their gods. And the people ate and bowed down to these gods. / So Israel joined in worshiping Baal of Peor, and the anger of the LORD burned against them.

2 Peter 2:15
They have left the straight way and wandered off to follow the way of Balaam son of Beor, who loved the wages of wickedness.

Jude 1:11
Woe to them! They have traveled the path of Cain; they have rushed headlong into the error of Balaam; they have perished in Korah’s rebellion.

1 Corinthians 10:8
We should not commit sexual immorality, as some of them did, and in one day twenty-three thousand of them died.

Acts 15:29
You must abstain from food sacrificed to idols, from blood, from the meat of strangled animals, and from sexual immorality. You will do well to avoid these things. Farewell.

2 Corinthians 6:14-16
Do not be unequally yoked with unbelievers. For what partnership can righteousness have with wickedness? Or what fellowship does light have with darkness? / What harmony is there between Christ and Belial? Or what does a believer have in common with an unbeliever? / What agreement can exist between the temple of God and idols? For we are the temple of the living God. As God has said: “I will dwell with them and walk among them, and I will be their God, and they will be My people.”

1 Timothy 4:1
Now the Spirit expressly states that in later times some will abandon the faith to follow deceitful spirits and the teachings of demons,

2 Timothy 3:1-5
But understand this: In the last days terrible times will come. / For men will be lovers of themselves, lovers of money, boastful, arrogant, abusive, disobedient to their parents, ungrateful, unholy, / unloving, unforgiving, slanderous, without self-control, brutal, without love of good, ...

1 John 4:1
Beloved, do not believe every spirit, but test the spirits to see whether they are from God. For many false prophets have gone out into the world.

Matthew 24:24
For false Christs and false prophets will appear and perform great signs and wonders to deceive even the elect, if that were possible.

1 Kings 16:31
And as if it were not enough for him to walk in the sins of Jeroboam son of Nebat, he even married Jezebel the daughter of Ethbaal king of the Sidonians, and he then proceeded to serve and worship Baal.

Deuteronomy 12:30-31
be careful not to be ensnared by their ways after they have been destroyed before you. Do not inquire about their gods, asking, “How do these nations serve their gods? I will do likewise.” / You must not worship the LORD your God in this way, because they practice for their gods every abomination which the LORD hates. They even burn their sons and daughters in the fire as sacrifices to their gods.

Exodus 34:15-16
Do not make a covenant with the inhabitants of the land, for when they prostitute themselves to their gods and sacrifice to them, they will invite you, and you will eat their sacrifices. / And when you take some of their daughters as brides for your sons, their daughters will prostitute themselves to their gods and cause your sons to do the same.

Psalm 106:28-29
They yoked themselves to Baal of Peor and ate sacrifices offered to lifeless gods. / So they provoked the LORD to anger with their deeds, and a plague broke out among them.

Jeremiah 23:14
And among the prophets of Jerusalem I have seen a horrible thing: They commit adultery and walk in lies. They strengthen the hands of evildoers, so that no one turns his back on wickedness. They are all like Sodom to Me; the people of Jerusalem are like Gomorrah.”