What do we learn from "Ko Amar Hashem"?
Malbim: Hashem summonsed them (refer to 3:9:1:3).
What is the meaning of "Tzar u'Seviv ha'Aretz"?
Rashi: The afflicter is prepared to come; he will come around this land. Radak - he will camp around it, so you will have no escape from him.
Malbim: They will besiege the land all around in every direction. Therefore, He sent other nations!
What strength will be taken down from you?
Radak: The storehouses that you accumulated in your tall palaces. You thought that they will be strength for you ? the enemy will remove them from you.
Why does it add "v'Navozu Armenosayich"?
Radak: This explains "v'Horid Mimech Uzech."
Radak (10): Since you amassed them via theft they will be plundered!