Deuteronomy 3:9 - Ellicott's Commentary On The Whole Bible

Sirion. — (Sion,Deut.448.) Sirion, or Shirion, and Shenir, are thought to have similar meanings. But the Targum inteprets Shenir as the “rock of snow.” Shirion, according to Gesenius, means “glittering like a breastplate.” It would not be safe to assert that the mention of the Sidonian name of Hermon makes this verse an addition after Israel was in Palestine, though it might be so. The Jewish commentator Rashi points out that, including the name Sion (Deuteronomy 4:48), “this mountain has four names. Why mention them? To declare the praise of the land of Israel, which had four kingdoms glorifying themselves in it, and each of them saying, ‘It is called after my name!’” But there are several notes of this kind in the Pentateuch. (See Genesis 23:2; Genesis 31:47; Numbers 13:22; also Joshua 14:15.)