Leviticus 22:6-10

The soul which hath touched any such shall be unclean until even, and shall not eat of the holy things, unless he wash his flesh with water.

And when the sun is down, he shall be clean, and shall afterward eat of the holy things; because it is his food.

That which dieth of itself, or is torn with beasts, he shall not eat to defile himself therewith: I am the LORD.

They shall therefore keep mine ordinance, lest they bear sin for it, and die therefore, if they profane it: I the LORD do sanctify them.

There shall no stranger eat of the holy thing: a sojourner of the priest, or an hired servant, shall not eat of the holy thing.