Leviticus 22:4-6

What man soever of the seed of Aaron {is} a leper, or hath a running issue; he shall not eat of the holy things, until he be clean. And whoso toucheth any thing {that is} unclean {by} the dead, or a man whose seed goeth from him; {running...: Heb. running of the reins} Or whosoever toucheth any creeping thing, whereby he may be made unclean, or a man of whom he may take uncleanness, whatsoever uncleanness he hath; 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.