Leviticus 18:16
You must not have sexual relations with your brother’s wife; that would shame your brother.

Leviticus 20:21
If a man marries his brother’s wife, it is an act of impurity. He has uncovered the nakedness of his brother; they shall be childless.

Mark 6:18
For John had been telling Herod, “It is not lawful for you to have your brother’s wife!”

Luke 3:19-20
But when he rebuked Herod the tetrarch regarding his brother’s wife Herodias and all the evils he had done, / Herod added this to them all: He locked John up in prison.

Matthew 5:32
But I tell you that anyone who divorces his wife, except for sexual immorality, brings adultery upon her. And he who marries a divorced woman commits adultery.

Matthew 19:9
Now I tell you that whoever divorces his wife, except for sexual immorality, and marries another woman commits adultery.”

Romans 7:2-3
For instance, a married woman is bound by law to her husband as long as he lives. But if her husband dies, she is released from the law of marriage. / So then, if she is joined to another man while her husband is still alive, she is called an adulteress; but if her husband dies, she is free from that law and is not an adulteress if she marries another man.

1 Corinthians 5:1
It is actually reported that there is sexual immorality among you, and of a kind that is intolerable even among pagans: A man has his father’s wife.

1 Corinthians 7:10-11
To the married I give this command (not I, but the Lord): A wife must not separate from her husband. / But if she does, she must remain unmarried or else be reconciled to her husband. And a husband must not divorce his wife.

1 Corinthians 7:39
A wife is bound to her husband as long as he lives. But if her husband dies, she is free to marry anyone she wishes, as long as he belongs to the Lord.

Malachi 2:14-16
Yet you ask, “Why?” It is because the LORD has been a witness between you and the wife of your youth, against whom you have broken faith, though she is your companion and your wife by covenant. / Has not the LORD made them one, having a portion of the Spirit? And why one? Because He seeks godly offspring. So guard yourselves in your spirit and do not break faith with the wife of your youth. / “For I hate divorce,” says the LORD, the God of Israel. “He who divorces his wife covers his garment with violence,” says the LORD of Hosts. So guard yourselves in your spirit and do not break faith.

Genesis 2:24
For this reason a man will leave his father and mother and be united to his wife, and they will become one flesh.

Deuteronomy 24:1-4
If a man marries a woman, but she becomes displeasing to him because he finds some indecency in her, he may write her a certificate of divorce, hand it to her, and send her away from his house. / If, after leaving his house, she goes and becomes another man’s wife, / and the second man hates her, writes her a certificate of divorce, hands it to her, and sends her away from his house, or if he dies, ...

2 Samuel 12:7-9
Then Nathan said to David, “You are that man! This is what the LORD, the God of Israel, says: ‘I anointed you king over Israel, and I delivered you from the hand of Saul. / I gave your master’s house to you and your master’s wives into your arms. I gave you the house of Israel and Judah, and if that was not enough, I would have given you even more. / Why then have you despised the command of the LORD by doing evil in His sight? You put Uriah the Hittite to the sword and took his wife as your own. You have slain him with the sword of the Ammonites.

Ezra 10:10-11
Then Ezra the priest stood up and said to them, “You have been unfaithful by marrying foreign women, adding to the guilt of Israel. / Now, therefore, make a confession to the LORD, the God of your fathers, and do His will. Separate yourselves from the people of the land and from your foreign wives.”