Romans 7:3

So then if, while her husband lives, she is married to another man, she shall be called an adulteress. But if the husband dies, she is free from the law, so that she is no adulteress by becoming another man's wife.

Matthew 5:32

But I say to you that whoever shall put away his wife, except for the cause of fornication, causes her to commit adultery. And whoever shall marry her who is put away commits adultery.

Exodus 20:14

You shall not commit adultery.

Leviticus 20:10

And a man who commits adultery with a man's wife, who commits adultery with his neighbor's wife, the adulterer and the adulteress shall surely be put to death.

Numbers 5:13-31

and a man lie with her carnally, and if it is hidden from the eyes of her husband and is kept hidden, and she is defiled, and there is no witness against her, neither is she taken in the act;

Deuteronomy 22:22-24

If a man is found lying with a woman married to a husband, then they shall both of them die, the man that lay with the woman, and the woman. So you shall put away evil from Israel.

Ruth 2:13

Then she said, Let me find favor in your sight, my lord, for you have comforted me; for you have spoken kindly to your handmaid, though I am not like one of your handmaidens.

1 Samuel 25:39-42

And David heard that Nabal had died, and he said, Blessed is Jehovah who has pleaded the cause of my reproach from the hand of Nabal, and has kept His servant from evil. For Jehovah has returned the wickedness of Nabal on his own head. And David sent and spoke with Abigail, to take her to him 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 standing her in the midst,

1 Timothy 5:11-14

But refuse younger widows, for whenever they grow lustful against Christ, they desire to 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
You shall not commit adultery.
Leviticus 20:10
And a man who commits adultery with a man's wife, who commits adultery with his neighbor's wife, the adulterer and the adulteress shall surely be put to death.
Numbers 5:13
and a man lie with her carnally, and if it is hidden from the eyes of her husband and is kept hidden, and she is defiled, and there is no witness against her, neither is she taken in the act;
Deuteronomy 22:22
If a man is found lying with a woman married to a husband, then they shall both of them die, the man that lay with the woman, and the woman. So you shall put away evil from Israel.
Matthew 5:32
But I say to you that whoever shall put away his wife, except for the cause of fornication, causes her to commit adultery. And whoever shall marry her who is put away commits 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 standing her in the midst,

Though

Ruth 2:13
Then she said, Let me find favor in your sight, my lord, for you have comforted me; for you have spoken kindly to your handmaid, though I am not like one of your handmaidens.
1 Samuel 25:39
And David heard that Nabal had died, and he said, Blessed is Jehovah who has pleaded the cause of my reproach from the hand of Nabal, and has kept His servant from evil. For Jehovah has returned the wickedness of Nabal on his own head. And David sent and spoke with Abigail, to take her to him for a wife.
1 Timothy 5:11
But refuse younger widows, for whenever they grow lustful against Christ, they desire to marry;

General references

Exodus 20:14
You shall not commit adultery.
Mark 10:9
Therefore what God has joined together, let not man put apart.