“And the Kohen shall order one of the birds slaughtered over spring water in an earthenware vessel.” In Parshas Metzorah, we learn about the purification process of a Jew who has been stricken with tzara’as, a supernatural form of leprosy caused by improper speech. After this leprosy has healed, a ritual is performed in which a bird is slaughtered over an earthenware vessel containing “mayim chayim,” spring water. Then, cedar wood and a low grass are wrapped with a red…