1 Corinthians 7:39
"The wife is bound by the law as long as her husband liveth; but if her husband be dead, she is at liberty to be married to whom she will; only in the Lord."
Cross References (ranked by relevance)
1 Corinthians 7:10
And unto the married I command, yet not I, but the Lord, Let not the wife depart from her husband:
1 Corinthians 7:15
But if the unbelieving depart, let him depart. A brother or a sister is not under bondage in such cases: but God hath called us to peace.
Malachi 2:11
Judah hath dealt treacherously, and an abomination is committed in Israel and in Jerusalem; for Judah hath profaned the holiness of the LORD which he loved, and hath married the daughter of a strange god.
Genesis 6:2
That the sons of God saw the daughters of men that they were fair; and they took them wives of all which they chose.