Mountain often represents Government and power in the Jewish mind set.
Forty: Transition or change
Often people will speak of the number forty as a generational number. There is no evidence for such an interpretation from the Scripture. The number 40 expresses a change or transition. The examples for such a view are seen throughout both the Old and New Covenants.
Numerous other examples could be provided, but these few sufficiently demonstrate the meaning and use of the number 40 in the Scriptures.
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Moses, a leader of Israel who led the Israelites out of Egypt.