What are the implications of "be'Chol Makom"?
Rashi: It implies that Ma'aser may even be eaten in a Beis ha'Kevaros. 1
What is the latter half of the Pasuk coming to teach us?
Rashi: Refer to 3:8:1:1*.
Moshav Zekenim, citing R. Eliezer of Garmaiza: If Levi received a portion, they would work the land. Now that they work for Hashem, Ma'aser is their portion from [what is received from] working the land.