Romanos 7

2 For the woman who has a husband is bound by law to the husband while he lives; but if the husband dies, she is discharged from the law of the husband.

3 So then if, while the husband lives, she is joined to another man, she will 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.