In Hebrew, the word Jordan means "the descender," for it begins at Mount Hermon in the north at about 200 feet above sea level, and literally plummets to the Sea (actually a lake) of Galilee ten miles south at 700 feet below sea level, and from there another two hundred miles to the Dead or Salt Sea at 1300 feet below sea level (the lowest piece of land on earth and a mightily inhospitable place to live).
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Mount Hermon is called in Arabic "Jabal Ash Shaykh" [mountain of the chief]. Its seasonal snow melt is important to the headwater flow of the Jordan River. Mt. Hermon, a sacred landmark in ancient Palestine, is mentioned often in the Bible as Hermon, Sion, Senir, and Shenir. The name Baal-Hermon records the reverence in which it was held by the worshipers of Baal. The Romans also revered it, as did the Druze (there is a Druze shrine near Hasbayya).
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Baal worshippers reverence Mt. Hermon; it is the place where the fallen angels first landed, according to the Book of Enoch.
8And we took at that time out of the hand of the two kings of the Amorites the land that was on this side Jordan, from the river of Arnon unto mount Hermon;
9(Which Hermon the Sidonians call Sirion; and the Amorites call it Shenir;)
10All the cities of the plain, and all Gilead, and all Bashan, unto Salchah and Edrei, cities of the kingdom of Og in Bashan.
11For only Og king of Bashan remained of the remnant of giants; behold his bedstead was a bedstead of iron; is it not in Rabbath of the children of Ammon? nine cubits was the length thereof, and four cubits the breadth of it, after the cubit of a man.
-- The Amorites are some of the giants.