Deuteronomy 17:2-5
If a man or woman among you in one of the towns that the LORD your God gives you is found doing evil in the sight of the LORD your God by transgressing His covenant / and going to worship other gods, bowing down to them or to the sun or moon or any of the host of heaven—which I have forbidden— / and if it is reported and you hear about it, you must investigate it thoroughly. If the report is true and such an abomination has happened in Israel, ...

Joshua 23:16
If you transgress the covenant of the LORD your God, which He commanded you, and go and serve other gods and bow down to them, then the anger of the LORD will burn against you, and you will quickly perish from this good land He has given you.”

Judges 2:11-13
And the Israelites did evil in the sight of the LORD and served the Baals. / Thus they forsook the LORD, the God of their fathers, who had brought them out of the land of Egypt, and they followed after various gods of the peoples around them. They bowed down to them and provoked the LORD to anger, / for they forsook Him and served Baal and the Ashtoreths.

1 Kings 11:4-6
For when Solomon grew old, his wives turned his heart after other gods, and he was not wholeheartedly devoted to the LORD his God, as his father David had been. / Solomon followed Ashtoreth the goddess of the Sidonians and Milcom the abomination of the Ammonites. / So Solomon did evil in the sight of the LORD; unlike his father David, he did not follow the LORD completely.

2 Kings 17:7-18
All this happened because the people of Israel had sinned against the LORD their God, who had brought them out of the land of Egypt from under the hand of Pharaoh king of Egypt. They had worshiped other gods / and walked in the customs of the nations that the LORD had driven out before the Israelites, as well as in the practices introduced by the kings of Israel. / The Israelites secretly did things against the LORD their God that were not right. From watchtower to fortified city, they built high places in all their cities. ...

Jeremiah 11:9-11
And the LORD told me, “There is a conspiracy among the men of Judah and the residents of Jerusalem. / They have returned to the sins of their forefathers who refused to obey My words. They have followed other gods to serve them. The house of Israel and the house of Judah have broken the covenant I made with their fathers. / Therefore this is what the LORD says: ‘I am about to bring upon them a disaster that they cannot escape. They will cry out to Me, but I will not listen to them.

Ezekiel 14:6-8
Therefore tell the house of Israel that this is what the Lord GOD says: ‘Repent and turn away from your idols; turn your faces away from all your abominations. / For when any Israelite or any foreigner dwelling in Israel separates himself from Me, sets up idols in his heart, and puts a wicked stumbling block before his face, and then comes to the prophet to inquire of Me, I the LORD will answer him Myself. / I will set My face against that man and make him a sign and a proverb; I will cut him off from among My people. Then you will know that I am the LORD.

Zephaniah 1:4-6
“I will stretch out My hand against Judah and against all who dwell in Jerusalem. I will cut off from this place every remnant of Baal, the names of the idolatrous and pagan priests— / those who bow on the rooftops to worship the host of heaven, those who bow down and swear by the LORD but also swear by Milcom, / and those who turn back from following the LORD, neither seeking the LORD nor inquiring of Him.”

Matthew 24:11-13
and many false prophets will arise and deceive many. / Because of the multiplication of wickedness, the love of most will grow cold. / But the one who perseveres to the end will be saved.

Matthew 7:15-20
Beware of false prophets. They come to you in sheep’s clothing, but inwardly they are ravenous wolves. / By their fruit you will recognize them. Are grapes gathered from thornbushes, or figs from thistles? / Likewise, every good tree bears good fruit, but a bad tree bears bad fruit. ...

Acts 20:29-30
I know that after my departure, savage wolves will come in among you and will not spare the flock. / Even from your own number, men will rise up and distort the truth to draw away disciples after them.

2 Corinthians 11:13-15
For such men are false apostles, deceitful workers, masquerading as apostles of Christ. / And no wonder, for Satan himself masquerades as an angel of light. / It is not surprising, then, if his servants masquerade as servants of righteousness. Their end will correspond to their actions.

Galatians 1:6-9
I am amazed how quickly you are deserting the One who called you by the grace of Christ and are turning to a different gospel— / which is not even a gospel. Evidently some people are troubling you and trying to distort the gospel of Christ. / But even if we or an angel from heaven should preach a gospel contrary to the one we preached to you, let him be under a curse! ...

2 Thessalonians 2:3-4
Let no one deceive you in any way, for it will not come until the rebellion occurs and the man of lawlessness—the son of destruction—is revealed. / He will oppose and exalt himself above every so-called god or object of worship. So he will seat himself in the temple of God, proclaiming himself to be God.

1 Timothy 4:1-2
Now the Spirit expressly states that in later times some will abandon the faith to follow deceitful spirits and the teachings of demons, / influenced by the hypocrisy of liars, whose consciences are seared with a hot iron.