You must not lie carnally with your neighbor's wife and thus defile yourself with her.

Matthew 5:27
You have heard that it was said, 'Do not commit adultery.'

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.

1 Corinthians 6:9
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,

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

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.

Numbers 5:13
by sleeping with another man, and it is concealed from her husband and her impurity is undetected (since there is no witness against her and she was not caught in the act),

Proverbs 6:29
So is he who sleeps with another man's wife; no one who touches her will go unpunished.

Moreover you shall not lie carnally with your neighbor's wife, to defile yourself with her.