"When the Most High caused nations to inherit, when He separated the sons of man, He set the bounds of the peoples according to the number of the children of Israel": When the Holy One Blessed be He divided the world for inheritance by the nations of the world, He specified the boundary of each nation so that they not become intermixed. He sent the sons of Gomer to (the territory of Gomer; the sons of Magog to Magog; the sons of Madai to Madai; the sons of Greece to Greece; the sons of Tuval to Tuval. He specified the boundaries of the nations so that they not enter Eretz Yisrael.