Deuteronomy 3:8-9

8So we took the land at that time out of the hand of the two kings of the Amorites who were beyond the Jordan, from the Valley of the Arnon to Mount Hermon 9(the Sidonians call aHermon bSirion, while the Amorites call it cSenir),

Deuteronomy 4:47-48

47And they took possession of his land and the land dof Og, the king of Bashan, the two kings of the Amorites, who lived to the east beyond the Jordan; 48 efrom Aroer, which is on the edge of the Valley of the Arnon, as far as Mount fSirion
Syriac; Hebrew Sion
(that is, hHermon),
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