What is "Nas"?
Rashi: It is an expression of Nisayon (a test). Ibn Ezra ? this is a command [to test]. Its grammatical form is like "Chal [Na Es Pnei Hashem]."
Why did he ask to test for 10 days?
Ibn Ezra: Scientists say that a living being cannot endure evil for more than nine days.
Malbim citing Mahari: Doctors say that damage from bad food is recognized on the face after 10 days.
What are Zero'im?
Rashi: They are a kind of legumes, in place of Pas Bag.
Ibn Ezra: They are old berries.
Ibn Ezra (15): They are rice or peas.
How did he explain to the Meltzar why he wants Zero'im?
Malbim: The purpose is to look beautiful and be healthy. Simple foods are best for this, and to make a clear brain and help investigation. Luxurious foods arouse illnesses.
