With the Tabernacle erected and the tribes arranged under their banners, God establishes His dwelling place in the very heart of the nation. The presence of the Divine demands an absolute standard of supreme holiness and purity. Consequently, immediately following the organization of the camps, a directive is given to remove those who are ritually impure, preventing them from defiling the sacred space [רמב״ן, רשב״ם, שד״ל]. The primary approach among commentators is that the specific language used to issue this command is not merely instructional, but rather a call for immediate, urgent action, establishing a permanent law for all generations. This urgency is particularly necessary because the directive is inherently difficult; evicting a person from their tent and community involves genuine sorrow and financial loss [הירש, מלבי״ם, צפנת פענח].
The Israelites' encampment in the desert was structured into three concentric zones, radiating from the inside out: the Camp of the Divine Presence encompassing the Tabernacle, the Camp of the Levites surrounding it, and the Camp of Israel where the remaining tribes resided. The distance an impure individual was required to keep corresponded directly to the severity of their impurity. The lightest degree of impurity involves contact with a corpse, which includes not only a complete body but also human bones [רש״י, משכיל לדוד, ברכת אשר]. Because this is the lightest level, the individual is only excluded from the Camp of the Divine Presence and is permitted to remain within the Levite and Israelite camps. Commentators prove this by noting that Moses, a Levite, carried the bones of Joseph within the Levite camp [רש״י, שפתי כהן, מזרחי].
A more severe level of impurity applies to a person experiencing unnatural bodily discharges. This condition is considered weightier because the impurity generates from within the person's own body. Accordingly, such an individual is expelled from both the Camp of the Divine Presence and the Camp of the Levites, though they may still reside within the Camp of Israel [רבנו בחיי, הירש, ביאור שטיינזלץ]. The most severe and contagious form of impurity is leprosy. A person afflicted with this condition is banished from all three camps, forced to dwell in complete isolation outside the entire Camp of Israel [רש״י, רלב״ג, כלי יקר].
Beyond the physical logistics of these boundaries, profound moral and spiritual dimensions exist within these three categories. One perspective links these specific impurities to the three cardinal sins that destroy society and drive away the Divine Presence. Leprosy stems from slander and pride, which are equated to idolatry. Bodily discharges reflect promiscuity and forbidden relations, while corpse impurity alludes to bloodshed [כלי יקר]. Another approach draws a parallel between the three camps and human anatomy. The Camp of the Divine Presence represents the brain, which must be kept clear of heretical thoughts associated with corpse impurity. The Camp of the Levites represents the heart, which must be guarded against the lustful desires linked to bodily discharges. Finally, the Camp of Israel mirrors the stomach, from which the forbidden foods associated with leprosy must be distanced [פני דוד].
The varying degrees of isolation also reflect a deep social and moral logic. The leper, having fractured relationships between friends and spouses through malicious speech, is punished with absolute social isolation. The individual with a discharge, having succumbed to personal lust, requires partial distancing. Conversely, one who contracts corpse impurity often does so while performing the righteous act of burying the dead. Because this impurity arises from a Commandment of profound kindness, the individual is treated with leniency and remains integrated within the broader society [שפתי כהן].
The exclusion of corpse impurity from the sanctuary serves as a stark ideological declaration against ancient pagan cultures. While other nations worshipped death and viewed it as a manifestation of divine power, Judaism sanctifies life, active creation, and free will. Therefore, death is entirely banished from the sanctuary, which stands as the ultimate representation of the living God [רש״ר הירש].
Historically, this vulnerability to physical impurity only emerged following the sin of the Golden Calf. Prior to that moral failing, the Israelites existed in a state of supreme, unified purity, entirely free from afflictions like leprosy or unnatural discharges [צרור המור, שפתי כהן]. Furthermore, the strict enforcement of these boundaries around the Tabernacle applied only while the structure was fully erected and actively serving as the resting place for the Divine Presence. During the nation's travels, when the sanctuary was dismantled and packed away, the impure were permitted to traverse the area until the camp was reestablished [תורה תמימה, שפתי כהן].