Exodus 31:18 And he gave unto Moses, when he had made an end of communing with him upon mount Sinai, two tables of testimony, tables of stone, written with the finger of God.
[Patriarchs & Prophets pp 364] He did not even then trust His precepts to the memory of a people who were prone to forget His requirements, but wrote them upon tables of stone. He would remove from Israel all possibility of mingling heathen traditions with His holy precepts, or of confounding His requirements with human ordinances or customs. But He did not stop with giving them the precepts of the Decalogue. The people had shown themselves so easily led astray that He would leave no door of temptation unguarded. Moses was commanded to write, as God should bid him, judgments and laws giving minute instruction as to what was required.
These directions relating to the duty of the people to God, to one another, and to the stranger were only the principles of the Ten Commandments amplified and given in a specific manner, that none need err. They were designed to guard the sacredness of the ten precepts engraved on the tables of stone. If man had kept the law of God, as given to Adam after his fall, preserved by Noah, and observed by Abraham, there would have been no necessity for the ordinance of circumcision. And if the descendants of Abraham had kept the covenant, of which circumcision was a sign, they would never have been seduced into idolatry, nor would it have been necessary for them to suffer a life of bondage in Egypt.
They would have kept God's law in mind, and there would have been no necessity for it to be proclaimed from Sinai or engraved upon the tables of stone. And had the people practiced the principles of the Ten Commandments, there would have been no need of the additional directions given to Moses. The sacrificial system, committed to Adam, was also perverted by his descendants. Superstition, idolatry, cruelty, and licentiousness corrupted the simple and significant service that God had appointed. Through long intercourse with idolaters the people of Israel had mingled many heathen customs with their worship; therefore the Lord gave them at Sinai definite instruction concerning the sacrificial service.
Leviticus 17:7 And they shall no more offer their sacrifices unto devils, after whom they have gone a whoring. This shall be a statute for ever unto them throughout their generations.
May God add His blessing to the study of His word. "Good night" and God bless!