Why does the Torah mention sending three times - in this Pasuk and the previous one?
Moshav Zekeinim (2, citing R. Eliezer of Garmaiza): They must be sent from three Machanos - of Kehunah, Leviyah and Yisrael. 1
Rashi learned this from the three mentions of "Machaneh". How will Rashi explain the three "Sheluchim" and how will R. Eliezer explain the three "Machanos"? Perhaps one teaches about the Mishkan, and one teaches about the Beis ha'Mikdash. (PF)