וְהַלְוִיִּ֞ם יַחֲנ֤וּ סָבִיב֙ לְמִשְׁכַּ֣ן הָעֵדֻ֔ת וְלֹֽא־יִהְיֶ֣ה קֶ֔צֶף עַל־עֲדַ֖ת בְּנֵ֣י יִשְׂרָאֵ֑ל וְשָׁמְרוּ֙ הַלְוִיִּ֔ם אֶת־מִשְׁמֶ֖רֶת מִשְׁכַּ֥ן הָעֵדֽוּת׃
et les Lévites camperont autour du tabernacle du statut, afin que la colère divine ne sévisse point sur la communauté des enfants d’Israël; et les Lévites auront sous leur garde le tabernacle du statut."
Rashi
וישלחו מן המחנה [COMMAND THE CHILDREN OF ISRAEL] THAT THEY SEND AWAY FROM THE CAMP [EVERY LEPER etc.] — There were three camps one within the other whenever they encamped: the area within the hangings was the “camp of the Shechinah”, the encampment of the Levites round about this, as is described in the Sedrah במדבר סיני (Numbers 1:53), was the “camp of the Levites”, and from there outward up to the end of the encampment of the divisions in all the four directions was the “camp of the Israelites”. The leper was sent out from all of them; the person suffering from a flux was allowed to stay in the “camp of the Israelites”, but was sent out from the two inner camps, whilst a person who had become unclean by reason of a corpse was allowed to stay in the “camp of the Levites” also, and was sent out only from that of the Shechinah. All this have our Rabbis deduced in Treatise Pesachim 67a from the verses of our text.