Leviticus 11:31-33

These are unclean to you among all that creep: whosoever doth touch them, when they be dead, shall be unclean until the even. And upon whatsoever any of them, when they are dead, doth fall, it shall be unclean; whether it be any vessel of wood, or raiment, or skin, or sack, whatsoever vessel it be, wherein any work is done, it must be put into water, and it shall be unclean until the even; so it shall be cleansed. And every earthen vessel, whereinto any of them falleth, whatsoever is in it shall be unclean; and ye shall break it.