1 Corinthians 6:18
Flee from sexual immorality. Every other sin a man can commit is outside his body, but he who sins sexually sins against his own body.

Matthew 5:28
But I tell you that anyone who looks at a woman to lust after her has already committed adultery with her in his heart.

James 1:14-15
But each one is tempted when by his own evil desires he is lured away and enticed. / Then after desire has conceived, it gives birth to sin; and sin, when it is full-grown, gives birth to death.

Galatians 5:19
The acts of the flesh are obvious: sexual immorality, impurity, and debauchery;

1 Thessalonians 4:3-5
For it is God’s will that you should be holy: You must abstain from sexual immorality; / each of you must know how to control his own body in holiness and honor, / not in lustful passion like the Gentiles who do not know God;

Romans 13:13-14
Let us behave decently, as in the daytime, not in carousing and drunkenness, not in sexual immorality and debauchery, not in dissension and jealousy. / Instead, clothe yourselves with the Lord Jesus Christ, and make no provision for the desires of the flesh.

1 Peter 2:11
Beloved, I urge you, as foreigners and exiles, to abstain from the desires of the flesh, which war against your soul.

Ephesians 5:3
But among you, as is proper among the saints, there must not be even a hint of sexual immorality, or of any kind of impurity, or of greed.

Colossians 3:5
Put to death, therefore, the components of your earthly nature: sexual immorality, impurity, lust, evil desires, and greed, which is idolatry.

Hebrews 13:4
Marriage should be honored by all and the marriage bed kept undefiled, for God will judge the sexually immoral and adulterers.

Job 31:9-12
If my heart has been enticed by my neighbor’s wife, or I have lurked at his door, / then may my own wife grind grain for another, and may other men sleep with her. / For that would be a heinous crime, an iniquity to be judged. ...

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

Exodus 20:14
You shall not commit adultery.

Deuteronomy 5:18
You shall not commit adultery.

Genesis 39:7-12
and after some time his master’s wife cast her eyes upon Joseph and said, “Sleep with me.” / But he refused. “Look,” he said to his master’s wife, “with me here, my master does not concern himself with anything in his house, and he has entrusted everything he owns to my care. / No one in this house is greater than I am. He has withheld nothing from me except you, because you are his wife. So how could I do such a great evil and sin against God?” ...