Leviticus 22:2-7

2Speak to Aaron and to his sons, that they separate themselves from the holy things of the children of Israel, and that they profane not my holy name in those things which they hallow to me: I am the LORD.

3Say to them, Whoever he may be of all your seed among your generations, that approacheth the holy things, which the children of Israel hallow to the LORD, having his uncleanness upon him, that soul shall be cut off from my presence: I am the LORD.

4Whatever man of the seed of Aaron is a leper, or hath a running issue; he shall not eat of the holy things, until he is clean. And whoever toucheth any thing that is unclean by the dead, or a man whose seed goeth from him;1

5Or whoever toucheth any creeping thing, by which he may be made unclean, or a man of whom he may take uncleanness, whatever uncleanness he hath;

6The soul who hath touched any such shall be unclean until evening, and shall not eat of the holy things, unless he shall wash his flesh with water.

7And when the sun is set, he shall be clean, and shall afterward eat of the holy things; because it is his food.