1)
What is the meaning of "v'Asisi Vach Es Asher Lo Asisi"?
1.
Radak: I will do to you what I did not do to another nation. This is like it says in the Tochachah "v'Hifla Hashem Es Makosecha" (Devarim 28:59).
2.
Malbim: Punishments that were not done - just like you did matters that were not done.
