Romans 7:3
“So then if, while the husband lives, she is joined to another man, she would be called an adulteress. But if the husband dies, she is free from the law, so that she is no adulteress, though she is joined to another man.”
What does Romans 7:3 mean?
Paul uses marriage as an illustration to help his readers understand spiritual freedom. He's pointing out that a woman bound by marriage vows to a living husband commits adultery if she joins herself to another man, but when her husband dies, she's released from that bond and can remarry without guilt. The illustration matters because Paul is working toward showing that we're similarly "freed" from the old law through Christ's death, so we can now belong to him in a new way. He's not laying down rules about remarriage here, but rather using something his audience understands about legal bonds to explain how our relationship with God changes through the gospel.