In Context

17 'And now, slay ye every male among the infants, yea, every woman known of man by the lying of a male ye have slain;

18 and all the infants among the women, who have not known the lying of a male, ye have kept alive for yourselves.

19 And ye, encamp ye at the outside of the camp seven days — any who hath slain a person, and any who hath come against a pierced one, ye cleanse yourselves on the third day, and on the seventh day — ye and your captives;

20 and every garment, and every skin vessel, and every work of goats' hair, and every wooden vessel, ye yourselves cleanse.'

21 And Eleazar the priest saith unto the men of the host who go in to battle, 'This is the statute of the law which Jehovah hath commanded Moses:

22 only, the gold, and the silver, the brass, the iron, the tin, and the lead,

Numbers 31:20 in Other Translations