11 Those who touch the dead body of any human being shall be unclean seven days. 12 They shall purify themselves with the water on the third day and on the seventh day, and so be clean; but if they do not purify themselves on the third day and on the seventh day, they will not become clean. 13 All who touch a corpse, the body of a human being who has died, and do not purify themselves, defile the tabernacle of the Lord; such persons shall be cut off from Israel. Since water for cleansing was not dashed on them, they remain unclean; their uncleanness is still on them. 14 This is the law when someone dies in a tent: everyone who comes into the tent, and everyone who is in the tent, shall be unclean seven days. 15 And every open vessel with no cover fastened on it is unclean. 16 Whoever in the open field touches one who has been killed by a sword, or who has died naturally, or a human bone, or a grave, shall be unclean seven days. 17 For the unclean they shall take some ashes of the burnt purification offering, and running water shall be added in a vessel; 18 then a clean person shall take hyssop, dip it in the water, and sprinkle it on the tent, on all the furnishings, on the persons who were there, and on whoever touched the bone, the slain, the corpse, or the grave.
Matthew Henry's Commentary on Numbers 19:11-18
Commentary on Numbers 19:11-22
(Read Numbers 19:11-22)
Why did the law make a corpse a defiling thing? Because death is the wages of sin, which entered into the world by it, and reigns by the power of it. The law could not conquer death, nor abolish it, as the gospel does, by bringing life and immortality to light, and so introducing a better hope. As the ashes of the heifer signified the merit of Christ, so the running water signified the power and grace of the blessed Spirit, who is compared to rivers of living water; and it is by his work that the righteousness of Christ is applied to us for our cleansing. Those who promise themselves benefit by the righteousness of Christ, while they submit not to the grace and influence of the Holy Spirit, do but deceive themselves; we cannot be purified by the ashes, otherwise than in the running water. What use could there be in these appointments, if they do not refer to the doctrines concerning the sacrifice of Christ? But comparing them with the New Testament, the knowledge to be got from them is evident. The true state of fallen man is shown in these institutions. Here we learn the defiling nature of sin, and are warned to avoid evil communications.