19 And as for you, remain outside the camp seven days; whoever has killed any person, and whoever has touched any slain, purify yourselves and your captives on the third day and on the seventh day. 20 Purify every garment, everything made of leather, everything woven of goats' hair, and everything made of wood."
21 Then Eleazar the priest said to the men of war who had gone to the battle, "This is the ordinance of the law which the Lord commanded Moses: 22 Only the gold, the silver, the bronze, the iron, the tin, and the lead, 23 everything that can endure fire, you shall put through the fire, and it shall be clean; and it shall be purified with the water of purification. But all that cannot endure fire you shall put through water. 24 And you shall wash your clothes on the seventh day and be clean, and afterward you may come into the camp."
Matthew Henry's Commentary on Numbers 31:19-24
Commentary on Numbers 31:19-24
(Read Numbers 31:19-24)
The Israelites had to purify themselves according to the law, and to abide without the camp seven days, though they had not contracted any moral guilt, the war being just and lawful, and commanded by God. Thus God would preserve in their minds a dread and detestation of shedding blood. The spoil had been used by Midianites, and being now come into the possession of Israelites, it was fit that it should be purified.