Rashi: Did you ever command to hold the corners of the world, like a man who holds the corners of his garment and shakes it? In the future, I will hold the corners of the world and shake off the Resha'im - "Hashem Yateh Yado v'Chashel Azur." This is like one who holds something; if he tilts his hand, it falls.

Ibn Ezra #1: Can you hold the corners of the world?

Ibn Ezra #2: This refers to the morning. He will hold the corners of the world, and every day the Resha'im will die - "Yitamu Chata'im Min ha'Aretz." Even though a Tzadik dies, "v'Chesed Hashem... Al Yere'av v'Tzidkaso li'Vnei Vanim."

Malbim: After the sun was set in place, at every moment dawn changes its place on the end of the earth. The verse depicts that he holds the corner of a garment and shakes off the dust and earth. So Hashem will shake the Resha'im from it. Wherever dawn illuminates, evil plunderers who tunnel into houses in the dark, they hide in their holes.