Smith's Bible Dictionary (1863)
(the two Egypts; red soil), the usual name of Egypt in the Old Testament the dual of Mazor, which is less frequently employed. Mizraim first occurs in the account of the Hamites in (Genesis 10:1) ... In the use of the name Mizraim for Egypt there can be no doubt that the dual indicates the two regions, upper and lower Egypt, into which the country has always been divided by nature as well as by its inhabitants.
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