Rashi: My garment. This is like "v'Hevi'u Vanayich b'Chotzen."

Ibn Ezra #1: It is my arm.

Ibn Ezra #2: The corner of my garment.

Malbim: The pocket of my garment. "V'Hevi'u Vanayich b'Chotzen" is a metaphor - they will carry your children like one who carries coins in his pocket.

Rashi: I shook out. This is like "Hisna'ari me'Afar" (Ibn Ezra - like "va'Yna'er Hashem Es Egypt").

Rashi: So Hashem will shake from the world and from his property, those who will not pardon the debts owed to them.

Malbim: Just like I shook my pocket, Hashem will shake him from Beiso, i.e. it will be destroyed. All his toil will be eradicated. Just like my pocket is empty, he will remain empty. He will never succeed again, even naturally.

Ibn Ezra: His sons.

Rashi: It is without property.

Ibn Ezra: They put to their hearts to do so.

Malbim: They did so with Simchah, like one who fulfills a Mitzvah. First he blesses on the Mitzvah. Here they did the Mitzvos of Tzedakah and returning a security. (Many investigated whether one should bless when fulfilling such Mitzvos.)