'Law of Moses' in the Bible

And the sons of the Kenite, father-in-law of Moses, went up from the city of palm-trees with the sons of Judah to the desert of Judah, which is in the south of Arad; and he went up and dwelt with the people:

And Heber the Kenite separated himself from Kain, from the sons of Hobab, father-in law of Moses, and he will stretch out his tent even to the oak in Zaanaim which is at Kadesh.