Gen 26:5 KJV Because that Abraham obeyed my voice, and kept my charge, my commandments, my statutes, and my laws.
Exo 16:4 KJV Then said the LORD unto Moses, Behold, I will rain bread from heaven for you; and the people shall go out and gather a certain rate every day, that I may prove them, whether they will walk in my law, or no.
Exo 16:28 KJV And the LORD said unto Moses, How long refuse ye to keep my commandments and my laws?
2Ki 17:13 KJV Yet the LORD testified against Israel, and against Judah, by all the prophets,
and by all the seers, saying, Turn ye from your evil ways, and keep my commandments
and my statutes, according to all the law which I commanded your fathers, and which I sent to you by my servants the prophets.
2Ki 21:8 KJV Neither will I make the feet of Israel move any more out of the land which I gave their fathers; only if they will observe to do according to all that I have commanded them, and according to all the law that my servant Moses commanded them.
2Ch 6:16 KJV Now therefore, O LORD God of Israel, keep with thy servant David my father that which thou hast promised him, saying, There shall not fail thee a man in my sight to sit upon the throne of Israel; yet so that thy children take heed to their way to walk in my law, as thou hast walked before me.
Psa 40:8 KJV I delight to do thy will, O my God: yea, thy law
is within my heart.
Psa 78:1 KJV Maschil of Asaph. Give ear, O my people,
to my law: incline your ears to the words of my mouth.
Psa 89:30-32 KJV 30 If his children forsake my law, and walk not in my judgments; 31 If they break my statutes, and keep not my commandments; 32 Then will I visit their transgression with the rod, and their iniquity with stripes.
Psa 119:18-19 KJV 18 Open thou mine eyes, that I may behold wondrous things out of thy law. 19 I
am a stranger in the earth: hide not thy commandments from me.
Psa 119:21 KJV Thou hast rebuked the proud
that are cursed, which do err from thy commandments.
Psa 119:32-35 KJV 32 I will run the way of thy commandments, when thou shalt enlarge my heart. 33 HE. Teach me, O LORD, the way of thy statutes; and I shall keep it
unto the end. 34 Give me understanding, and I shall keep thy law; yea, I shall observe it with
my whole heart. 35 Make me to go in the path of thy commandments; for therein do I delight.
Psa 119:44-48 KJV 44 So shall I keep thy law continually for ever and ever. 45 And I will walk at liberty: for I seek thy precepts. 46 I will speak of thy testimonies also before kings, and will not be ashamed. 47 And I will delight myself in thy commandments, which I have loved. 48 My hands also will I lift up unto thy commandments, which I have loved; and I will meditate in thy statutes.
Psa 119:53 KJV Horror hath taken hold upon me because of the wicked that forsake thy law.
Psa 119:55 KJV I have remembered thy name, O LORD, in the night, and have kept thy law.
Psa 119:60-61 KJV 60 I made haste, and delayed not to keep thy commandments. 61 The bands of the wicked have robbed me:
but I have not forgotten thy law.
(So this goes on for about another 100 verses or so).
Well, the Old Testament is just full of references to law and commandments being under the ownership of God. The idea that they belong to Israel is ill-conceived, at best.