39 A wife is bound to her husband during his lifetime; but if her husband dies, she is free to marry whomever she will, provided it be in the Lord.
1 Corinthians 7:39 Cross References - MNT
Romans 7:2-3
2 For a married woman who has a husband is bound by law to her husband during his lifetime; but if her husband dies, she is released from the law of her husband.
3 So then, if during her husband lifetime, she unites herself with another man, she will be counted an adulteress; but if her husband dies, she is free from the Law, so that she is no adulteress, even if she unites herself with another man.
1 Corinthians 7:10
10 But to those already married my commandment is—and not mine, but the Lord's—that a wife is not to leave her husband;
1 Corinthians 7:15
15 But if the unbelieving partner be determined to leave, separation let it be. In such cases the believing husband or wife is not under bondage. But it is into peace that God has called us.
2 Corinthians 6:14-16
14 Be not unequally yoked with unbelievers; for what fellowship has righteousness with lawlessness? what communion has light with darkness?
15 What concord has Christ with Belial? What portion has a believer with an unbeliever?
16 And what compact has God's temple with idols? For we are a temple of the living God, as he has said: I will dwell among them, and walk about among them; I will be their God, and they will be my people.