Nehemiah 13:28-29
Even one of the sons of Jehoiada son of Eliashib the high priest had become a son-in-law to Sanballat the Horonite. Therefore I drove him away from me. / Remember them, O my God, because they have defiled the priesthood and the covenant of the priesthood and of the Levites.

1 Kings 11:1-8
King Solomon, however, loved many foreign women along with the daughter of Pharaoh—women of Moab, Ammon, Edom, and Sidon, as well as Hittite women. / These women were from the nations about which the LORD had told the Israelites, “You must not intermarry with them, for surely they will turn your hearts after their gods.” Yet Solomon clung to these women in love. / He had seven hundred wives of royal birth and three hundred concubines—and his wives turned his heart away. ...

2 Corinthians 6:14-18
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.” ...

Deuteronomy 7:3-4
Do not intermarry with them. Do not give your daughters to their sons or take their daughters for your sons, / because they will turn your sons away from following Me to serve other gods. Then the anger of the LORD will burn against you, and He will swiftly destroy you.

Malachi 2:11-12
Judah has broken faith; an abomination has been committed in Israel and in Jerusalem. For Judah has profaned the LORD’s beloved sanctuary by marrying the daughter of a foreign god. / As for the man who does this, may the LORD cut off from the tents of Jacob everyone who is awake and aware—even if he brings an offering to the LORD of Hosts.

1 Corinthians 5:9-13
I wrote you in my letter not to associate with sexually immoral people. / I was not including the sexually immoral of this world, or the greedy and swindlers, or idolaters. In that case you would have to leave this world. / But now I am writing you not to associate with anyone who claims to be a brother but is sexually immoral or greedy, an idolater or a verbal abuser, a drunkard or a swindler. With such a man do not even eat. ...

Nehemiah 10:28-30
“The rest of the people—the priests, Levites, gatekeepers, singers, temple servants, and all who had separated themselves from the people of the land to obey the Law of God—along with their wives and all their sons and daughters who are able to understand, / hereby join with their noble brothers and commit themselves with a sworn oath to follow the Law of God given through His servant Moses and to obey carefully all the commandments, ordinances, and statutes of the LORD our Lord. / We will not give our daughters in marriage to the people of the land, and we will not take their daughters for our sons.

2 Kings 17:33-34
They worshiped the LORD, but they also served their own gods according to the customs of the nations from which they had been carried away. / To this day they are still practicing their former customs. None of them worship the LORD or observe the statutes, ordinances, laws, and commandments that the LORD gave the descendants of Jacob, whom He named Israel.

1 Peter 1:14-16
As obedient children, do not conform to the passions of your former ignorance. / But just as He who called you is holy, so be holy in all you do, / for it is written: “Be holy, because I am holy.”

Joshua 23:12-13
For if you turn away and cling to the rest of these nations that remain among you, and if you intermarry and associate with them, / know for sure that the LORD your God will no longer drive out these nations before you. Instead, they will become for you a snare and a trap, a scourge in your sides and thorns in your eyes, until you perish from this good land that the LORD your God has given you.

2 Corinthians 7:1
Therefore, beloved, since we have these promises, let us cleanse ourselves from everything that defiles body and spirit, perfecting holiness in the fear of God.

Judges 3:5-6
Thus the Israelites continued to live among the Canaanites, Hittites, Amorites, Perizzites, Hivites, and Jebusites. / And they took the daughters of these people in marriage, gave their own daughters to their sons, and served their gods.

1 Kings 16:31-33
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. / First, Ahab set up an altar for Baal in the temple of Baal that he had built in Samaria. / Then he set up an Asherah pole. Thus Ahab did more to provoke the LORD, the God of Israel, to anger than all the kings of Israel before him.

Romans 12:1-2
Therefore I urge you, brothers, on account of God’s mercy, to offer your bodies as living sacrifices, holy and pleasing to God, which is your spiritual service of worship. / Do not be conformed to this world, but be transformed by the renewing of your mind. Then you will be able to test and approve what is the good, pleasing, and perfect will of God.

Nehemiah 9:2
Those of Israelite descent separated themselves from all the foreigners, and they stood and confessed their sins and the iniquities of their fathers.