Exodus 20:14

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

You shall not commit adultery.

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.

The commandments “Do not commit adultery,” “Do not murder,” “Do not steal,” “Do not covet,” and any other commandments, are summed up in this one decree: “Love your neighbor as yourself.”

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.

You have heard that it was said, ‘Do not commit adultery.’

But to the cowardly and unbelieving and abominable and murderers and sexually immoral and sorcerers and idolaters and all liars, their place will be in the lake that burns with fire and sulfur. This is the second death.”

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