Leviticus 11:31-36

³¹These are they which are unclean to you amongst all that creep. Whoever touches them when they are dead shall be unclean until the evening.

³²Anything they fall on when they are dead shall be unclean; whether it is any vessel of wood, or clothing, or skin, or sack, whatever vessel it is, with which any work is done, it must be put into water, and it shall be unclean until the evening. Then it will be clean.

³³Every earthen vessel into which any of them falls and all that is in it shall be unclean. You shall break it.

³⁴All food which may be eaten which is soaked in water shall be unclean. All drink that may be drunk in every such vessel shall be unclean.

³⁵Everything whereupon part of their carcass falls shall be unclean; whether oven, or range for pots, it shall be broken in pieces. They are unclean, and shall be unclean to you.

³⁶Nevertheless a spring or a cistern in which water is gathered shall be clean, but that which touches their carcass shall be unclean.