Numbers 31:24

אל המחנה [YE SHALL BE CLEAN, AND AFTERWARDS] YE MAY COME INTO THE CAMP — into the camp where is the Divine Presence (מחנה שכינה), because a person unclean by reason of a corpse does not require expulsion from the camp of the Levites and the camp of the Israelites, (but only from the camp of the Shechina, and consequently the permission to come into the camp after purification must mean into the מחנה שכינה; Pesachim 67a; cf. Rashi on 5:2).

וְכִבַּסְתֶּ֧ם בִּגְדֵיכֶ֛ם בַּיּ֥וֹם הַשְּׁבִיעִ֖י וּטְהַרְתֶּ֑ם וְאַחַ֖ר תָּבֹ֥אוּ אֶל־הַֽמַּחֲנֶֽה׃ {ס}        

And you shall wash your clothes on the seventh day, and you shall be clean, and afterwards you shall come into the camp.