1)
Why does it say "l'Charvos l'Chorev Shemamah"?
1.
Radak: The verse explains, for what ruins will it be ? ruin of desolation.
2.
Malbim: This is a great, absolute destruction, more than it said above "Shemamah v'Charbah" (9).
2)
Why does it specify "mi'Migdol Sevenah v'Ad Gevul Kush"?
1.
Malbim: This is the entire land of Egypt.
