The purification process for someone recovering from a skin disease reaches its peak as they stand at the threshold of the Tabernacle, ready to complete their atonement and rejoin the community. The responsibility of guiding this transition rests entirely on the purifying priest. This specific duty is restricted to the priest appointed for the process, ensuring that no ordinary Israelite performs it, even though Israelites participate in other stages of the purification [אור החיים]. The priest carefully positions the individual alongside the sheep brought for the sacrifice [רשב״ם, חזקוני, שטיינזלץ] and the measure of oil [מלבי״ם]. The primary approach among commentators is that the person, the guilt offering, and the oil are positioned together so they can be waved in a dedicated ceremony. This specific waving process excludes the sin and burnt offerings, which do not require it [מלבי״ם, אדרת אליהו, הופמן].
The person undergoing purification requires strict supervision from the priest, even if they are an adult well-versed in Tabernacle laws [אור החיים]. At the same time, the rules of this ceremony are not limited to adult men; they apply equally to women and children going through the purification process [מלבי״ם, אדרת אליהו]. The priest places the individual precisely at the eastern gate of the courtyard, known as the Gate of Nicanor. Standing with their back to the east and facing west, the person looks directly into the entrance of the Sanctuary. This specific orientation is considered standing directly before God [מזרחי, שפתי חכמים, תורה תמימה, אדרת אליהו].
This precise location presents a serious legal challenge. Because the individual has not yet completed their atonement, they are still forbidden from entering the holy courtyard. Doing so prematurely carries a severe divine penalty [רש״י, הירש, הופמן]. To solve this, the space within the gate itself was intentionally left unsanctified, allowing the person to stand there without violating the prohibition of entering the holy grounds [מזרחי, שפתי חכמים, גור אריה, דברי דוד]. However, during the ritual, the individual must reach their head, hands, and feet into the sanctified courtyard so the priest can apply the sacrificial blood and oil to them. Normally, inserting parts of the body into the courtyard is also strictly forbidden. This unique exception is permitted by a specific divine decree, necessary because bringing the sacred blood and oil outside the courtyard would immediately invalidate them [מזרחי, גור אריה, דברי דוד].
Commentators offer different perspectives on how this exception works. Some view it as the positive commandment of purification actively overriding the prohibition of impurity. Others explain that because this action is the very method of achieving purity, it is simply not classified as a sin of defiling the sanctuary at all [גור אריה]. Because of this highly sensitive physical arrangement, where the person stands on the boundary and reaches only their limbs inside, the priest must carefully supervise them to ensure they do not accidentally stumble forward into the forbidden area [אור החיים]. This delicate balance at the threshold perfectly reflects the nature of holiness itself, which exists in distinct levels that a person must navigate and ascend step by step [תורה תמימה, מלבי״ם].