1)
What are "Mishkenos Avel"?
1.
Rashi: Their end.
2.
Malbim: You said that the Nefesh is not eternal. This is not for Tzadikim or Stam people. It is only for Resha'im who sinned greatly and were cut off from the world to come. Also their seed is cut off in this world. He refers to Iyov - his children and deeds (property) were cut off, and also his Nefesh will perish, since he does not believe that it is eternal. He is among those who have no share in the world to come!
2)
What do we learn from "v'Zeh Mekom Lo Yada Kel"?
1.
Ibn Ezra: "Avel" applies to the Reisha (Mishkenos) and Seifa (the place of Avel, Hashem does not know).
