Why, in connection with Moshe and Aharon and his sons, does the Torah write "ve'ha'Chonim lifnei ha'Mishkan" and not 'Yachanu' (in the command form)?
Rashi: Because the Torah is merely informing us that those who encamped in front of the Mishkan on the east were Moshe and Aharon and his sons 1 - hinting 2 that that is why Yehudah, Yisachar and Zevulun who were their neighbors, were all great in Torah. 3
See Sifsei Chachamim.
Rashi: Based on the principle "Tov la'Tzadik, Tov li'Shecheino'.
Rashi: As we find in Tehilim, 60:9, in Divrei ha'Yamim 1, 12:33 and in Shoftim, 5:14, respectively.
Why is there a P'sik (a stroke) between Moshe, and Aharon and his sons?
Oznayim la'Torah: To make a break between Moshe and Aharon and his sons - to teach us that the Kohanim (Aharon, Elazar and Isamar) stood guard in three locations 1 and not four - since Moshe is not included in "Shomrim Mishmeres ha'Mikdash". 2
Ba'al ha'Turim: To teach us that Moshe on the one hand, and Aharon and his sons on the other, encamped separately.
Why does the Torah repeat "Shomrim Mishmeres ha'Mikdash le'Mishmeres ... " three times?
Tamid, 26a: To hint at the three locations where the Kohanim stood guard in the Beis-Hamikdash. 1
Having taught us in Pasuk 10 that a Zar who serves is Chayav Misah, why does the Torah repeat it here?