Romans 7:3
Therefore while the husband lives, she shall be called an adulteress if she is married to another man; but if the husband has died, she is free from the law, so that she is not an adulteress if married to another man.
Matthew 5:32
But I tell you, that whoever puts away his wife, except for adultery, causes her to commit adultery; and whoever marries her that is put away, commits adultery.
Mark 10:6-12
but from the beginning of creation, he made them male and female.
John 8:3-5
And the scribes and Pharisees brought him a woman taken in adultery, and placing her in the midst
1 Timothy 5:11-14
But reject the younger widows; for when they fall into pleasure to the neglect of Christ, they wish to marry,