Running water - literally, living water, i. e. water fresh from the spring Genesis 26:19; Numbers 19:17.

Over running water - Literally, living, that is, spring water. The meaning appears to be this: Some water (about a quarter of a log, an eggshell and a half full, according to the rabbins) was taken from a spring, and put into a clean earthen vessel, and they killed the bird over this water, that the blood might drop into it; and in this blood and water mixed, they dipped the instrument before described, and sprinkled it seven times upon the person who was to be cleansed. The living or spring water was chosen because it was purer than what was taken from pits or wells, the latter being often in a putrid or corrupt state; for in a ceremony of purifying or cleansing, every thing must be as pure and perfect as possible.

And the priest shall command that one of the birds be killed,.... That is, shall command another priest to kill one of them, or an Israelite, as Aben Ezra; and who also observes, that some say the leper, or the butcher, as the Targum of Jonathan; the killing of this bird, not being a sacrifice, might be done without the camp, as it was, and not at the altar, near to which sacrifices were slain, and where they were offered: and this was to be done

in an earthen vessel over running water: this vessel, according to the Jewish traditions (a), was to be a new one, and a fourth part of a log of running water was to be put into it, and then the bird was to be killed over it, and its blood squeezed into it, and then a hole was dug, and it was buried before the leprous person; and so it should be rendered, "over an earthen vessel", as it is in the Tigurine version, and by Noldius (b); for how could it be killed in it, especially when water was in it? the killing of this bird may have respect to the sufferings, death, and bloodshed of Christ, which were necessary for the purging and cleansing of leprous sinners, and which were endured in his human nature, comparable to an earthen vessel, as an human body sometimes is; see 2 Corinthians 4:7; for he was crucified through weakness, and was put to death in the flesh, 2 Corinthians 13:4; and the running or living water mixed with blood may denote both the sanctification and justification of Christ's people by the water and blood which sprung from his pierced side, and the continual virtue thereof to take away sin, and free from it; or the active and passive obedience of Christ, which both together are the matter of a sinner's justification before God.

(a) Negaim, c. 14. sect. 1.((b) Ebr. Concord. part. p. 64. No. 318.

The priest was to have one of the birds killed into an earthen vessel upon fresh water (water drawn from a fountain or brook, Leviticus 15:13; Genesis 26:19), that is to say, slain in such a manner that its blood should flow into the fresh water which was in a vessel, and should mix with it. He was then to take the (other) live bird, together with the cedar-wood, scarlet, and hyssop, and dip them (these accompaniments) along with the bird into the blood of the one which had been killed over the water. With this the person cured of leprosy was to be sprinkled seven times (see Leviticus 4:6) and purified; after which the living bird was to be "let loose upon the face of the field," i.e., to be allowed to fly away into the open country. The two birds were symbols of the person to be cleansed. The one let loose into the open country is regarded by all the commentators as a symbolical representation of the fact, that the former leper was now imbued with new vital energy, and released from the fetters of his disease, and could now return in liberty again into the fellowship of his countrymen. But if this is established, the other must also be a symbol of the leper; and just as in the second the essential point in the symbol was its escape to the open country, in the first the main point must have been its death. Not, however, in this sense, that it was a figurative representation of the previous condition of the leper; but that, although it was no true sacrifice, since there was no sprinkling of blood in connection with it, its bloody death was intended to show that the leper would necessarily have suffered death on account of his uncleanness, which reached to the very foundation of his life, if the mercy of God had not delivered him from this punishment of sin, and restored to him the full power and vigour of life again. The restitution of this full and vigorous life was secured to him symbolically, by his being sprinkled with the blood of the bird which was killed in is stead. But because his liability to death had assumed a bodily form in the uncleanness of leprosy, he was sprinkled not only with blood, but with the flowing water of purification into which the blood had flowed, and was thus purified from his mortal uncleanness. Whereas one of the birds, however, had to lay down its life, and shed its blood for the person to be cleansed, the other was made into a symbol of the person to be cleansed by being bathed in the mixture of blood and water; and its release, to return to its fellows and into its nest, represented his deliverance from the ban of death which rested upon leprosy, and his return to the fellowship of his own nation. This signification of the rite serves to explain not only the appointment of birds for the purpose, since free unfettered movement in all directions could not be more fittingly represented by anything than by birds, which are distinguished from all other animals by their freedom and rapidity of motion, but also the necessity for their being alive and clean, viz., to set forth the renewal of life and purification; also the addition of cedar-wood, scarlet wool, and hyssop, by which the life-giving power of the blood mixed with living (spring) water was to be still further strengthened. The cedar-wood, on account of its antiseptic qualities (ἔχει ἄσηπτον ἡ κέδρος, Theodor. on Ezekiel 17:22), was a symbol of the continuance of life; the coccus colour, a symbol of freshness of life, or fulness of vital energy; and the hyssop (βοτάνη ῥυπτική, herba humilis, medicinalis, purgandis pulmonibus apta: August. on Psalm 51), a symbol of purification from the corruption of death. The sprinkling was performed seven times, because it referred to a readmission into the covenant, the stamp of which was seven; and it was made with a mixture of blood and fresh water, the blood signifying life, the water purification.

And the priest shall command that one of the birds be killed in an earthen vessel over {c} running water:

(c) Running water, or of the fountains.

14:5 Killed - By some other man. The priest did not kill it himself, because it was not properly a sacrifice, as being killed without the camp, and not in that place to which all sacrifices were confined. In an earthen - vessel - That is, over running water put in an earthen - vessel - Thus the blood of the bird and the water were mixed together, partly for the conveniency of sprinkling, and partly to signify Christ, who came by water and blood, 1John 5:6. The running water, that is, spring or river water by its liveliness and motion did fitly signify the restoring of liveliness to the leper, who was in a manner dead before.

[2] vessel

The earthen vessel typifies the humanity of Christ, as the running water typifies the Holy Spirit as the "Spirit of life" Rom 8:2 "put to death in the flesh, but quickened by the Spirit." 1Pet 3:18

5-9. the priest shall command that one of the birds be killed . over running water-As the blood of a single bird would not have been sufficient to immerse the body of another bird, it was mingled with spring water to increase the quantity necessary for the appointed sprinklings, which were to be repeated seven times, denoting a complete purification. (See 2Ki 5:10; Ps 51:2; Mt 8:4; Lu 5:14). The living bird being then set free, in token of the leper's release from quarantine, the priest pronounced him clean; and this official declaration was made with all solemnity, in order that the mind of the leper might be duly impressed with a sense of the divine goodness, and that others might be satisfied they might safely hold intercourse with him. Several other purifications had to be gone through during a series of seven days, and the whole process had to be repeated on the seventh, ere he was allowed to re-enter the camp. The circumstance of a priest being employed seems to imply that instruction suitable to the newly recovered leper would be given, and that the symbolical ceremonies used in the process of cleansing leprosy would be explained. How far they were then understood we cannot tell. But we can trace some instructive analogies between the leprosy and the disease of sin, and between the rites observed in the process of cleansing leprosy and the provisions of the Gospel. The chief of these analogies is that as it was only when a leper exhibited a certain change of state that orders were given by the priest for a sacrifice, so a sinner must be in the exercise of faith and penitence ere the benefits of the gospel remedy can be enjoyed by him. The slain bird and the bird let loose are supposed to typify, the one the death, and the other the resurrection of Christ; while the sprinklings on him that had been leprous typified the requirements which led a believer to cleanse himself from all filthiness of the flesh and spirit, and to perfect his holiness in the fear of the Lord.

14:1-9 The priests could not cleanse the lepers; but when the Lord removed the plague, various rules were to be observed in admitting them again to the ordinances of God, and the society of his people. They represent many duties and exercises of truly repenting sinners, and the duties of ministers respecting them. If we apply this to the spiritual leprosy of sin, it intimates that when we withdraw from those who walk disorderly, we must not count them as enemies, but admonish them as brethren. And also that when God by his grace has brought to repentance, they ought with tenderness and joy, and sincere affection, to be received again. Care should always be taken that sinners may not be encouraged, nor penitents discouraged. If it were found that the leprosy was healed, the priest must declare it with the particular solemnities here described. The two birds, one killed, and the other dipped in the blood of the bird that was killed, and then let loose, may signify Christ shedding his blood for sinners, and rising and ascending into heaven. The priest having pronounced the leper clean from the disease, he must make himself clean from all remains of it. Thus those who have comfort of the remission of their sins, must with care and caution cleanse themselves from sins; for every one that has this hope in him, will be concerned to purify himself.