Numbers 5:1-4

The LORD spoke to Moses, saying, “Command the Israelites to send away from the camp every leper and everyone who has a discharge, and whoever is defiled [that is, ceremonially unclean] by [coming in contact with] the dead. You shall send away both male and female; you shall send them outside the camp so that they will not defile their camp where I dwell in their midst.” The Israelites did so, and sent them outside the camp; just as the LORD had said to Moses, so the Israelites did.