Why did the Levi'im not receive a portion in Eretz Yisrael?
Rashi: Because, since they are designated for the service of the Mizbe'ach, 1 they are not free to plow and sow when necessary.
What does the Torah mean when it writes "Hashem Hu Nachalasos"?
Rashi: They receive a designated reward from 'the house of the King'.
Targum Onkelos and Targum Yonasan: It means that the Matanos that Hashem gives them is their portion.