Mark 12:19
Their statement is accurate. This was indeed in the law. In this way a family line could be perpetuated. However, what ensues after this is a perfect illustration of the fact that the law cannot save. It only instructs.
Heavenly Father, thank you for instructions, but thank you also for life. Without life in Christ we would be stuck trying to be righteous on the basis of the law alone and you know how that would go. Your plan is perfect. Thank you! In the name of the Lord Jesus Christ I pray and praise you, Amen.