Romans 7:3

Therefore if she marry another man while her husband liveth, she will be called an adultress: but if her husband be dead, she is free from that law, so as to be no adultress, though she marry another man.

Matthew 5:32

But I say unto you, whosoever shall put away his wife, save for the cause of whoredom, causeth her to commit adultery: and whosoever marrieth her that is put away, committeth adultery.

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 bring a woman taken in adultery, and having set her in the midst,

1 Timothy 5:11-14

But the younger widows refuse; for when they are waxed wanton against Christ, they want 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

Matthew 5:32
But I say unto you, whosoever shall put away his wife, save for the cause of whoredom, causeth her to commit adultery: and whosoever marrieth her that is put away, 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 bring a woman taken in adultery, and having set her in the midst,

Though

1 Timothy 5:11
But the younger widows refuse; for when they are waxed wanton against Christ, they want to marry;

General references

Mark 10:9
What therefore God hath joined together, let not man put asunder.