30 A man may not take his father's wife or have sex relations with a woman who is his father's.

Matthew Henry's Commentary on Deuteronomy 22:30

Commentary on Deuteronomy 22:13-30

(Read Deuteronomy 22:13-30)

These and the like regulations might be needful then, and yet it is not necessary that we should curiously examine respecting them. The laws relate to the seventh commandment, laying a restraint upon fleshly lusts which war against the soul.