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In the Old Testament or the Hebrew Bible, Jethro ( //; Hebrew: יִתְרוֹ, Standard Yitro Tiberian Yiṯrô; "His Excellence/Posterity" ; Arabic شعيب Shu-ayb) is Moses' father-in-law, a Kenite shepherd and priest of Midian. He is also revered as a prophet in his own right in the Druze religion, and considered an ancestor of the Druze.
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". After Moses had begun to lead the Israelites on their Exodus, 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 judgment of smaller matters coming before him. This takes place in the Torah portion Yitro (Exodus 18:1-20:23).
There is a controversy about this father-in-law of Moses and whether or not the Bible contradicts itself in regard to his name(s). In the KJV version of Judges 4:11, a man named Hobab appears as Moses' father-in-law, while Numbers 10:29 makes him "the son of Raguel [Reuel] the Midianite, Moses' father in law". One thing to consider is that there is only one Biblical Hebrew word for both "brother-in-law" and "father-in-law" (chathan) . It is, in fact, the word for any and all relations by marriage. If one takes into account the Biblical custom of multiple names for one person as well as Judges 4:11 calling Hobab Reuel's son, Reuel and Jethro both appear as Moses' father-in-law, while Hobab must be seen as his brother-in-law. There are, however, disputes among theologians in this matter.  
Under the name Shuʿayb or Shoaib, (Arabic: شعيب; meaning Who shows the right path), Jethro is revered as a Prophet of Islam though Islam attributes to him many deeds not attested in the Bible. He is believed to have lived after Abraham, and Muslims believe that he was sent as a prophet to two communities, namely the Midianites  and the People of the Wood. To both the people, Shoaib proclaimed the faith of Islam and warned the people to end their fraudulent ways. When they did not repent, God destroyed both the communities. Shoaib is understood by Muslims to have been one of the few Arabian prophets mentioned by name in the Qur'an, the others being Saleh, Hud, Ishmael and Muhammad. It is said that he was known by early Muslims as "the eloquent preacher amongst the prophets", because he was, according to Islamic tradition, granted talent and eloquence in his language.
Unlike the account in the Hebrew Bible, Islam does not closely associate Shuʿayb with Moses/Musa, also hounored as a Prophet of Islam.
Shoaib is particularly central in the rites and pilgimages of the Druze religion.