Numbers 5:2-4

2“Command the sons of Israel that they 1send away from the camp everyone with leprosy, everyone having a 2discharge, and everyone who is 3unclean because of contact with a dead person. 3You shall send away both male and female; you shall send them outside the camp so that they do not defile their camp where I dwell 4in their midst.” 4And the sons of Israel did so and sent them outside the camp; just as the Lord had spoken to Moses, that is what the sons of Israel did.