Parashas Naso · Passuk 5:02
Instruct the Israelites to remove from camp anyone with an eruption or a dischargeaan eruption or a discharge See Leviticus chapters 13 and 15, respectively. and anyone defiled by a corpse.
Chabad.org — English translation + Rashi
Source: Pesachim 67a.
English: “And they shall send from the camp” — \ldots and so we find regarding the Tent of Meeting.
In context: Further units address the three camps (Shechinah, Leviyah, Yisrael) and which impure persons are excluded from each.
Custom
Chazal distinguish the three concentric camps and the grades of impurity excluded from each.