Leviticus 11:32-33

11:32 Also, anything they fall on when they die will become unclean – any wood vessel or garment or article of leather or sackcloth. Any such vessel with which work is done must be immersed in water and will be unclean until the evening. Then it will become clean. 11:33 As for any clay vessel they fall into, everything in it will become unclean and you must break it.