Romans 7:1-3

I write to you, dear brothers and sisters, who are familiar with the law. Don’t you know that when a person dies, it ends his obligation to the law? For example, a married couple is bound by the law to remain together until separated by death. But when one spouse dies, the other is released from the law of the marriage. So then if a wife is joined to another man while still married, she commits adultery. But if her husband dies, she is obviously free from the marriage contract and may marry another man without being charged with adultery.