What is "mi'Shod Aniyim"?
Rashi: Due to oppression of Aniyim via you, e.g. I and my men, and the Kohanim of Nov
Why does the verse distinguish Aniyim from Evyonim?
Malbim: The Evyonim has nothing for them to steal. He cries that they do not want to save him via Tzedakah and Chesed.
Why will Hashem rise?
Rashi: [Due to oppression of Aniyim and their cries,] He will rise to help them.
Malbim: He rises to punish people who harm others
What tense is "Yomar Hashem"?
Radak: It is [future; it is] a Nevu'ah.
What is the meaning of "Yafi'ach"?
Rashi: It is an expression of speech. It is common in Mishlei and Chabakuk - "v'Yafe'ach la'Ketz v'Lo Yechazev" (Chabakuk 2:3).
Rashi citing Menachem: It is an expression of a trap - "ha'Pach Nishbar" (124:7).
What is the meaning of "Ashis b'Yesha Yafi'ach Lo"?
Radak: I will save the poor from the traps that they set to trap them. The same applies to "Yafichu Kiryah" (Mishlei 29:8) - they set a trap.