Leviticus 18:20

"Moreover thou shalt not lie carnally with thy neighbour’s wife, to defile thyself with her."

Cross References (ranked by relevance)

Exodus 20:14

Thou shalt not commit adultery.

Hebrews 13:4

Marriage is honourable in all, and the bed undefiled: but whoremongers and adulterers God will judge.

Leviticus 20:10

And the man that committeth adultery with another man’s wife, even he that committeth adultery with his neighbour’s wife, the adulterer and the adulteress shall surely be put to death.

1 Corinthians 6:9

Know ye not that the unrighteous shall not inherit the kingdom of God? Be not deceived: neither fornicators, nor idolaters, nor adulterers, nor effeminate, nor abusers of themselves with mankind,

Proverbs 6:25

Lust not after her beauty in thine heart; neither let her take thee with her eyelids.

Deuteronomy 5:18

Neither shalt thou commit adultery.

Malachi 3:5

And I will come near to you to judgment; and I will be a swift witness against the sorcerers, and against the adulterers, and against false swearers, and against those that oppress the hireling in his wages, the widow, and the fatherless, and that turn aside the stranger from his right, and fear not me, saith the LORD of hosts.

Deuteronomy 22:25

But if a man find a betrothed damsel in the field, and the man force her, and lie with her: then the man only that lay with her shall die:

Deuteronomy 22:22

If a man be found lying with a woman married to an husband, then they shall both of them die, both the man that lay with the woman, and the woman: so shalt thou put away evil from Israel.

Romans 2:22

Thou that sayest a man should not commit adultery, dost thou commit adultery? thou that abhorrest idols, dost thou commit sacrilege?

Galatians 5:19

Now the works of the flesh are manifest, which are these; Adultery, fornication, uncleanness, lasciviousness,

2 Samuel 11:27

And when the mourning was past, David sent and fetched her to his house, and she became his wife, and bare him a son. But the thing that David had done displeased the LORD.