Then Eleazar the priest said to the men in the army who had gone to battle: “This is the statute of the law that the LORD has commanded Moses:
And ye shall wash your clothes on the seventh day,.... As the leper did, Lev 14:9, and ye shall be clean, and afterward ye shall come into the camp; into the camp of Israel, into the camp of the Levites, and into the camp of God, the tabernacle.
Num 31:21-24 To this end Eleazar, whose duty it was as high priest to see that the laws of purification were properly observed, issued fuller instructions with reference to the purification of the different articles, in accordance with the law in ch. 19. למּלחמה הבּאים, those who came to the war, i.e., who went into the battle (see at Num 10:9). “The ordinance of the law:” as in Num 19:2.
Commenting on Numbers 31:21-24