'Law of Moses' in the Bible

And Jethro, priest of Midian, father-in-law of Moses, heard all that God had done for Moses, and for Israel his people, - in that Yahweh had brought forth Israel out of Egypt.

Then took Jethro father-in-law of Moses, an ascending-offering and sacrifices to God, - and Aaron and all the elders of Israel came in to eat bread with the father-in-law of Moses before God.