C. F. Keil and Franz Delitzsch on Numbers 36:13

Num 36:13

The conclusion refers not merely to the laws and rights contained in Num 33:50-36:13, but includes the rest of the laws given in the steppes of Moab (ch. 25-30), and forms the conclusion tot he whole book, which places the lawgiving in the steppes of Moab by the side of the lawgiving at Mount Sinai (Lev 26:46; Lev 27:34) and bring sit to a close, though without in any way implying that the explanation (בּאר, Deu 1:5), further development, and hortatory enforcement of the law and its testimonies, statutes, and judgments (Deu 1:5; Deu 4:44., Num 12:1.), which follow in Deuteronomy, are not of Mosaic origin.