Leviticus 20:10
If a man commits adultery with another man’s wife—with the wife of his neighbor—both the adulterer and the adulteress must surely be put to death.

Deuteronomy 22:22
If a man is found lying with another man’s wife, both the man who slept with her and the woman must die. You must purge the evil from Israel.

John 8:3-11
The scribes and Pharisees, however, brought to Him a woman caught in adultery. They made her stand before them / and said, “Teacher, this woman was caught in the act of adultery. / In the Law Moses commanded us to stone such a woman. So what do You say?” ...

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.

1 Corinthians 6:9-10
Do you not know that the wicked will not inherit the kingdom of God? Do not be deceived: Neither the sexually immoral, nor idolaters, nor adulterers, nor men who submit to or perform homosexual acts, / nor thieves, nor the greedy, nor drunkards, nor verbal abusers, nor swindlers, will inherit the kingdom of God.

Proverbs 6:32-35
He who commits adultery lacks judgment; whoever does so destroys himself. / Wounds and dishonor will befall him, and his reproach will never be wiped away. / For jealousy enrages a husband, and he will show no mercy in the day of vengeance. ...

Leviticus 18:20
You must not lie carnally with your neighbor’s wife and thus defile yourself with her.

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, ...

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.

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

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.

Hosea 4:14
I will not punish your daughters when they prostitute themselves, nor your daughters-in-law when they commit adultery. For the men themselves go off with prostitutes and offer sacrifices with shrine prostitutes. So a people without understanding will come to ruin.

Jeremiah 3:8
She saw that because faithless Israel had committed adultery, I gave her a certificate of divorce and sent her away. Yet that unfaithful sister Judah had no fear and prostituted herself as well.

Ezekiel 16:38
And I will sentence you to the punishment of women who commit adultery and those who shed blood; so I will bring upon you the wrath of your bloodshed and jealousy.

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.