Bible Verses About Widow: Marriage of, authorized

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.

A wife is bound by law for as long as her husband lives; but if the husband is dead, she is free to be married to whomever she desires, only in the Lord.