if you are right i need to test it. how can you prove this.
The Promised Land
I think Exodus chapter 18 shows that Jethro did this:
It was Jethro who inspired the Jewish system of rabbis and courts that continues to this day. It was Jethro who taught Moses how to organize a political hierarchy and to delegate responsibilities, thus the decan system.
But it doesn't say that Jethro gave him the commandments. Moses already had those.
Jethro is called a priest of Midian and became father-in-law of Moses after he gave his daughter, Zipporah, in marriage to Moses.
In Exodus 2:18 Moses's father-in-law is named Reuel, and this is repeated in Numbers 10:29 (where Hobab is described as Reuel's son). In the Hebrew version of Judges 4:11, Hobab is described as Moses's father-in-law, while in others as his brother-in-law. (see Judges 4:11)
Jethro is recorded as living in Midian; a territory stretching along the eastern edge of the Gulf of Aqaba in what is today, northwestern Saudi Arabia. Some believe Midian is within the Sinai Peninsula. Biblical maps from antiquity show Midian on both locations.
Jethro's daughter, Zipporah, became Moses's wife after Moses had fled Egypt, after he killed an Egyptian who was beating a Hebrew slave. Moses is said to have worked as a shepherd for Jethro for 40 years before returning to Egypt to lead the Hebrews to Canaan, the "promised land". During that time, Jethro trained Moses, and taught him the pure religion of Yahweh. Moses was ordained a High Priest by Jethro before he returned to Egypt. It was Jethro that encouraged Moses to appoint others to share in the burden of ministry to the nation Israel by allowing others to help in the judgement of smaller matters coming before him.
Yitro is the name of one of the 54 weekly Torah readings or Parshiot (Exodus 18:1-20:23). In it, Jethro advises Moses to establish a system of courts to relieve Moses of the crushing burden of judging all disputes. The portion also contains the Ten Commandments.
In Numbers 14, God condemned the Israelites to wander in the desert for fourty years, waiting for the unfaithful generation to pass away. It was not only Moses, but that entire generation who would pass away in the desert, so that none of that rebellious generation would enter the promised land. The fourty years was a punishment, but also a lenient one. God was ready to destroy all of Israel for the latest in their string of transgressions (Num 14:12), but Moses convinced God to reduce the sentence and allow Israel to survive (Num 14:13-19).
In Deuteronomy 34, Moses was the last of that generation still standing. He lived to see the promised land from afar, but not to cross the Jordan and enter it.
So the fourty years exile in the desert was not just punishment for the sins of Moses, but for the unfaithfulness of an entire generation.