Numbers 5:2-4

2Command the children of Israel, that they put out of the camp every leper, and every one that hath an issue, and whosoever is defiled by a dead person:

3both male and female shall ye put out; outside the camp shall ye put them, that they defile not their camps, in the midst whereof I dwell.

4And the children of Israel did so, and put them outside the camp: as Jehovah had said to Moses, so did the children of Israel.