Numbers 31:23

19 All of you who have killed a person or touched the dead are to remain outside the camp for seven days. On the third day and the seventh day you are to purify both yourselves and your captives.

20 And purify every garment and leather good, everything made of goat’s hair, and every article of wood.”

21 Then Eleazar the priest said to the soldiers who had gone into battle, “This is the statute of the law which the LORD has commanded Moses:

22 Only the gold, silver, bronze, iron, tin, and lead—

23 everything that can withstand the fire—must be put through the fire, and it will be clean. But it must still be purified with the water of purification. And everything that cannot withstand the fire must pass through the water.

24 On the seventh day you are to wash your clothes, and you will be clean. After that you may enter the camp.”

25 The LORD said to Moses,

26 “You and Eleazar the priest and the family heads of the congregation are to take a count of what was captured, both of man and beast.

27 Then divide the captives between the troops who went out to battle and the rest of the congregation.

Read all of Numbers 31