Numbers 5:1

“And the Lord spake unto Moses, etc.] Jarchi says, what follows was said on the day the tabernacle was erected, but it seems rather to have been delivered after the several camps were formed, and the people numbered, when those that were unclean were ordered to be cast out of them: saying; as follows.”

“THE UNCLEAN TO BE REMOVED OUT OF THE CAMP. (Num 5:1-4) Command the children of Israel, that they put out of the camp every leper--The exclusion of leprous persons from the camp in the wilderness, as from cities and villages afterwards, was a sanitary measure taken according to prescribed rules (Lev. 13:1-14:57). This exclusion of lepers from society has been acted upon ever since; and it affords almost the only instance in which any kind of attention is paid in the East to the prevention of contagion. The usage still more or less prevails in the East among people who do not think the least precaution against the plague or cholera necessary; but judging from personal observation, we think…”

“The general purpose of the directions given in this and the next chapter is to attest and to vindicate, by modes in harmony with the spirit of the theocratical law, the sanctity of the people of God. Thus, the congregation of Israel was made to typify the Church of God, within which, in its perfection, nothing that offends can be allowed to remain (compare Matthew 8:22; Revelation 21:27). The general purpose of the directions given in this and the next chapter is to attest and to vindicate, by modes in harmony with the spirit of the theocratical law, the sanctity of the people of God. Thus, the congregation of Israel was made to typify the Church of God, within which, in its perfection,…”

“5:1–10:10 These legal matters were to ensure the purity of the Israelites, their priesthood, and the Tabernacle. Such regulations drew constant attention to ancient Israel’s identity as a theocracy of which Moses was the primary spokesman. 5:1-31 These laws concern purity, restitution, and marital faithfulness. 5:1-4 Modern Westerners find the need for ceremonial or ritual purity difficult to understand. Westerners view skin diseases, bodily discharge, and contact with corpses as concerns of health and hygiene, but the primary issue in the Old Testament is guarding God’s holiness against ceremonial uncleanness (see Lev 11–15). The community had to safeguard the holiness of the camp so that…”

“Removal of Unclean Persons out of the Camp. - As Jehovah, the Holy One, dwelt in the midst of the camp of His people, those who were affected with the uncleanness of leprosy (Lev 13), of a diseased flux, or of menstruation ( Lev 15:2., Num 15:19.), and those who had become unclean through touching a corpse ( Num 19:11., cf. Lev 21:1; Lev 22:4), whether male or female, were to be removed out of the camp, that they might not defile it by their uncleanness. The command of God, to remove these persons out of the camp, was carried out at once by the nation; and even in Canaan it was so far observed, that lepers at any rate were placed in special pest-houses outside the cities (see at Lev…”