ADDITIONS TO THE LAW OF MOSES
There are several references outside of the written Law (Torah: Genesis, Exodus, Leviticus, Numbers & Deuteronomy) which include additions or clarifications to that which was already established. These all do, however, refer back specifically to the written Law.
A King Over Israel (1 Samuel 8:6-22)
6But the thing displeased Samuel when they said, “Give us a king to judge us.” So Samuel prayed to the Lord. 7And the Lord said to Samuel, “Heed the voice of the people in all that they say to you; for they have not rejected you, but they have rejected Me, that I should not reign over them. 8According to all the works which they have done since the day that I brought them up out of Egypt, even to this day—with which they have forsaken Me and served other gods—so they are doing to you also. 9Now therefore, heed their voice. However, you shall solemnly forewarn them, and show them the behavior of the king who will reign over them.”
10So Samuel told all the words of the Lord to the people who asked him for a king. 11And he said, “This will be the behavior of the king who will reign over you: He will take your sons and appoint them for his own chariots and to be his horsemen, and some will run before his chariots. 12He will appoint captains over his thousands and captains over his fifties, will set some to plow his ground and reap his harvest, and some to make his weapons of war and equipment for his chariots. 13He will take your daughters to be perfumers, cooks, and bakers. 14And he will take the best of your fields, your vineyards, and your olive groves, and give them to his servants. 15He will take a tenth of your grain and your vintage, and give it to his officers and servants. 16And he will take your male servants, your female servants, your finest young men, and your donkeys, and put them to his work. 17He will take a tenth of your sheep. And you will be his servants. 18And you will cry out in that day because of your king whom you have chosen for yourselves, and the Lord will not hear you in that day.”
19Nevertheless the people refused to obey the voice of Samuel; and they said, “No, but we will have a king over us, 20that we also may be like all the nations, and that our king may judge us and go out before us and fight our battles.” 21And Samuel heard all the words of the people, and he repeated them in the hearing of the Lord. 22So the Lord said to Samuel, “Heed their voice, and make them a king.” And Samuel said to the men of Israel, “Every man go to his city.”
This passage describes how, by rejecting God as their sovereign leader, the Israelites would be required to pay additional costs; monetary, their sons and daughters, animals, servants and land would all be required by their king. And they would serve the king, instead of God. And they would cry out to God to deliver them from their leader, and God would not hear them.