Numbers 31:19-21

Amplified Bible

¹⁹ Camp outside the camp for seven days; whoever has killed any person and whoever has touched any dead body, purify yourselves and your captives, on the third day and on the seventh day. ²⁰ You shall purify every garment and every article made of leather and all the things made of goats’ hair, and every article made of wood.”

²¹ Then Eleazar 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: