Numbers 31:19-24 - Purification After Battle

¹⁹ You yourselves will have to keep outside the tent-circle for seven days, anyone of you who has put any person to death or come near a dead body; and on the third day and on the seventh day make yourselves and your prisoners clean. ²⁰ And every bit of clothing, and anything made of leather or goats' hair or wood, you are to make clean.

²¹ Then Eleazar the priest said to the men of war who had been to the fight, This is the rule of the law which the Lord has given to Moses: ²² But gold and silver and brass and iron and tin and lead, ²³ And anything which may be heated, is to go through the fire and be made clean; but in addition it is to be put in the water of cleaning: and anything which may not go through the fire is to be put in the water. ²⁴ And on the seventh day, after washing your clothing, you will be clean, and then you may come into the tent-circle.