Numbers 5:1-4 - Rules Concerning Those Unclean
1 And Jehovah will speak to Moses, saying, 2 Command the sons of Israel, and they shall send forth from the camp every one leprous, and every one flowing, and every one unclean for the soul: 3 From male even to female ye shall send them forth, without the camp shall ye send them; and they shall not defile their camp where I dwell in the midst of them. 4 And the sons of Israel will do so, and they will send them forth without the camp: as Jehovah spake to Moses, so did the sons of Israel.