What is the meaning of "Hishmi'u El Bavel"?
Rashi: This is like "va'Yshama Sha'ul Es ha'Am" (Shmuel I, 15:4). Announce to gather to Bavel.
Radak: Gather. An expression of Shemi'ah is used, for we gather people via making a proclamation heard. The same applies to "va'Yshama Sha'ul Es ha'Am" (Shmuel I, 15:4).
Malbim: After Yisrael fled Bavel, Hashem commands many nations to gather.
What are "Rabim"?
Rashi: They are archers. This is like "Yasobu Alav Rabav" (Iyov 16:13). Radak - and "va'Ymararuhu va'Robu" (Bereishis 49:23).
Radak citing Targum Yonasan: They are many. This is like "Rabim Atah Am ha'Aretz" (Shemos 5:5).
What are "k'Fa'alah" and "k'Chol Asher Asah"?
Malbim: Pa'al is engaging [in the action]. Ma'aseh is finishing the matter. Pay them according to the engagement, and do Midah k'Neged Midah for what they did.
What is the meaning of "[Ki El Hashem] Zedah"?
Radak: It is past conjugation; it is based on Zadon (intentional sin).
Radak citing Targum Yonasan: On Hashem's nation you disgraced; you said improper words.
Malbim: Its engagement was to deny Hashem's ability. Its final action was to burn the Mikdash and Ir ha'Kodesh
