Leviticus 11:34-36

Amplified Bible

³⁴ Any of the food which may be eaten, but on which [unclean] water falls, shall become unclean, and any liquid that may be drunk in every container shall become unclean. ³⁵ Everything that part of their carcass falls on becomes unclean; an oven, or a small stove shall be smashed; they are unclean, and shall be unclean to you. ³⁶ Nevertheless a spring or a cistern (reservoir) collecting water shall be clean; but whoever touches one of these carcasses shall be unclean.