Leviticus 22:3-5

³“Tell them, ‘If anyone of all your offspring throughout your generations approaches the holy things which the children of Israel make holy to Yahweh, having his uncleanness on him, that soul shall be cut off from before me. I am Yahweh.

⁴“‘Whoever of the offspring of Aaron is a leper or has a discharge shall not eat of the holy things until he is clean. Whoever touches anything that is unclean by the dead, or a man who has a seminal emission,

⁵or whoever touches any creeping thing by which he may be made unclean, or a man from whom he may become unclean, whatever uncleanness he has—