Ezekiel 29:11

No foot of man shall pass through it
This must be understood not strictly, but with some limitation; it cannot be thought that Egypt was so depopulated as that there should not be a single passenger in it; but that there should be few inhabitants in it, or that there should be scarce any that should come into it for traffic; it should not be frequented as it had been at least there should be very few that travelled in it, in comparison of what had: no foot of beast shall pass through it:
no droves of sheep and oxen, and such like useful cattle, only beasts of prey should dwell in it: neither shall it be inhabited forty years:
afterwards, ( Ezekiel 29:17 ) , a prophecy is given out concerning the destruction of it by Nebuchadnezzar, which was in the twenty seventh year, that is, of Jeconiah's captivity; now allowing three years for the fulfilment of that prophecy, or forty years, a round number put for forty three years, they will end about the time that Cyrus conquered Babylon, at which time the seventy years' captivity of the Jews ended; and very likely the captivity of the Egyptians also. The Jews pretend to give a reason why Egypt lay waste just forty years, because the famine, signified in Pharaoh's dream, was to have lasted, as they make it out, forty two years; whereas, according to them, it continued only two years; and, instead of the other forty years of famine, Egypt must be forty years uninhabited: this is mentioned both by Jarchi and Kimchi.