to make a difference between the unclean and the clean, and between the creature that may be eaten and the creature that may not be eaten.

then the priest shall command that they empty the house before the priest goes to see the plague, so that all that is in the house may not become unclean. And afterwards the priest shall go in to see the house.

You shall not do these so that the land may not spew you out also when you defile it, as it spewed out the nations that were before you.

And they shall keep My ordinance, lest they bear sin for it, that they may not die for it when they defile it. I, Jehovah, sanctify them.

And a priest's daughter, when she belongs to a man, a stranger, she may not eat of the heave offering of the holy things.

But the field of the open land of their cities may not be sold, for it is theirs forever.