1)
Why did the Levi'im not receive a portion in Eretz Yisrael?
1.
Rashi: Because, since they are designated for the service of the Mizbe'ach, they are not free to plow and sow when necessary.
1
Ramban: As the Torah writes in Bamidbar 18:2.
2
Ramban: Because whatever was performed in the Beis ha'Mikdash was for the sake of the Korbanos.
2)
Which Cheilek ve'Nachalah is the Torah referring to?
1.
Rashi (in Parshas Shoftim, 18:2): It refers to the Keini, K'nizi and Kadmoni - Edom, Amon and Mo'av, which Yisrael will inherit in the time of Mashi'ach. 1
3)
What does the Torah mean when it writes "Hashem Hu Nachalaso"?