Numbers 31:19-21

Revised Standard Version

¹⁹ Encamp outside the camp seven days; whoever of you has killed any person, and whoever has touched any slain, purify yourselves and your captives on the third day and on the seventh day. ²⁰ You shall purify every garment, every article of skin, all work of goats’ hair, and every article of wood.”

²¹ And Elea′zar the priest said to the men of war who had gone to battle: “This is the statute of the law which the Lord has commanded Moses: