Leviticus 22:4-6

What man soever of the seed of Aaron is a leper, or hath an issue; he shall not eat of the holy things, until he be clean. And whoso toucheth anything that is unclean by the dead, or a man whose seed goeth from him; 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 that toucheth any such shall be unclean until the even, and shall not eat of the holy things, unless he bathe his flesh in water.