Leviticus 13:46
All the time that he is a leper and unclean he shall dwell alone without the camp.

Numbers 4:49
Moses reckoned them up according to the word of the Lord, every one according to their office and burdens, as the Lord had commanded him.

Numbers 5:2
Command the children of Israel, that they cast out of the camp every leper, and whosoever hath an issue of seed, or is defiled by the dead:

Numbers 12:14
And the Lord answered him: If her father had spitten upon her face, ought she not to have been ashamed for seven days at least? Let her be separated seven days without the camp, and afterwards she shall be called again.