Bamidbar 31:21

21 And Eleazar HaKohen said unto the anshei hatzavah which went into milchamah, This is the chukkat hatorah which Hashem commanded Moshe:

Bamidbar 31:21 Meaning and Commentary

Numbers 31:21

And Eleazar the priest said unto the men of war, which went to
the battle
To all the soldiers, officers, and common men:

this is the ordinance of the law, which the Lord commanded Moses;
concerning the purification of unclean persons and things, hereby confirming what Moses had said.

Bamidbar 31:21 In-Context

19 And do ye abide outside the machaneh shivat yamim; whosoever hath killed nefesh, and whosoever hath touched any chalal, purify both yourselves and your captives on Yom HaShelishi and on Yom HaShevi’i.

20 And purify all your beged, and all keli ohr (all that is made of leather), ma’aseh izzim (all that is made of goat hair) and keli etz (all that is make of wood).

21 And Eleazar HaKohen said unto the anshei hatzavah which went into milchamah, This is the chukkat hatorah which Hashem commanded Moshe:

22 Only the zahav, and the kesef, the nechoshet, the barzel, the bedil, and the oferet,

23 Everything that can withstand eish, ye shall make it go through the eish, and it shall be tahor; nevertheless it shall be purified with the mayim of niddah; and all that can not withstand the eish ye shall make go through the mayim.