Will they then know that He is Hashem?
Malbim: They will recognize that He oversees and punishes.
What is the significance of dead bodies amidst the idols?
Malbim: This will show that Hashem oversees and punishes.
Why does it say "El Kol Giv'ah"?
Radak: This is like Al Kol Giv'ah. There are many verses like this.
Is "Kol Giv'ah Ramah b'Chol Roshei Harim"?!
Radak: A Vov is omitted; it means uv'Chol Roshei Harim". This is like "Shemesh Yare'ach" (Chabakuk 3:11) and similar verses.
What is "Elah"?
Rashi: It is a sapling.
What is "Avutah"?
Rashi: This is like "Etz Avos" (20:28); it has many branches. Radak ? Avutah is feminine of Avos, just like the feminine of Adom is Adumah.
Why is there a Sheva in "Mekom"?
Radak: Mekom is Samuch to the word Ta'am 1 (which is omitted). The same applies to "Mekom Lo Yada Kel" (Iyov 18:21).
I do not understand why it should say Ta'am. Perhaps there is a printing mistake. Ibn Ezra in Iyov says that there, it is Samuch to the word "Avel" earlier in the verse; it is as if Avel is repeated. (PF)
What does the verse teach about all of these places?
Malbim: Their dead bodies will be there, to teach that this is punishment for their sin.