Romans 7:3

So then, if while her husband liveth, she is married to another man, she shall be called an adulteress: but if her husband is dead, she is free from that law; so that she is no adulteress, though she be married to another man.

Matthew 5:32

But I say to you, That whoever shall put away his wife, saving for the cause of lewdness, causeth her to commit adultery: and whoever shall marry her that is divorced, committeth adultery.

Exodus 20:14

Thou shalt not commit adultery.

Leviticus 20:10

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

Numbers 5:13-31

And a man shall lie with her carnally, and it shall be hid from the eyes of her husband, and be kept close, and she be defiled, and there be no witness against her, neither she be taken with the manner;

Deuteronomy 22:22-24

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

Ruth 2:13

Then she said, Let me find favor in thy sight, my lord; for that thou hast comforted me, and for that thou hast spoken kindly to thy handmaid, though I am not like to one of thy handmaidens.

1 Samuel 25:39-42

And when David heard that Nabal was dead, he said, Blessed be the LORD, that hath pleaded the cause of my reproach from the hand of Nabal, and hath kept his servant from evil: for the LORD hath returned the wickedness of Nabal upon his own head. And David sent and communed with Abigail, to take her to himself for a wife.

Mark 10:6-12

But from the beginning of the creation, God made them male and female.

John 8:3-5

And the scribes and Pharisees brought to him a woman taken in adultery: and when they had set her in the midst,

1 Timothy 5:11-14

But the younger widows refuse: for when they have begun to grow wanton against Christ, they will marry;

Treasury of Scripture Knowledge

Summary

So then if, while her husband liveth, she be married to another man, she shall be called an adulteress: but if her husband be dead, she is free from that law; so that she is no adulteress, though she be married to another man.

General references

Bible References

So then

Exodus 20:14
Thou shalt not commit adultery.
Leviticus 20:10
And the man that committeth adultery with another man's wife, even he that committeth adultery with his neighbor's wife, the adulterer and the adulteress shall surely be put to death.
Numbers 5:13
And a man shall lie with her carnally, and it shall be hid from the eyes of her husband, and be kept close, and she be defiled, and there be no witness against her, neither she be taken with the manner;
Deuteronomy 22:22
If a man shall be found lying with a woman married to a husband, then they shall both of them die, both the man that lay with the woman, and the woman: so shalt thou remove evil from Israel.
Matthew 5:32
But I say to you, That whoever shall put away his wife, saving for the cause of lewdness, causeth her to commit adultery: and whoever shall marry her that is divorced, committeth adultery.
Mark 10:6
But from the beginning of the creation, God made them male and female.
John 8:3
And the scribes and Pharisees brought to him a woman taken in adultery: and when they had set her in the midst,

Though

Ruth 2:13
Then she said, Let me find favor in thy sight, my lord; for that thou hast comforted me, and for that thou hast spoken kindly to thy handmaid, though I am not like to one of thy handmaidens.
1 Samuel 25:39
And when David heard that Nabal was dead, he said, Blessed be the LORD, that hath pleaded the cause of my reproach from the hand of Nabal, and hath kept his servant from evil: for the LORD hath returned the wickedness of Nabal upon his own head. And David sent and communed with Abigail, to take her to himself for a wife.
1 Timothy 5:11
But the younger widows refuse: for when they have begun to grow wanton against Christ, they will marry;

General references

Exodus 20:14
Thou shalt not commit adultery.
Mark 10:9
What therefore God hath joined together, let not man separate.