Leviticus 11:34-38

Of all meat which may be eaten, that on which such water cometh shall be unclean: and all drink that may be drunk in every such vessel shall be unclean.

And every thing whereupon any part of their carcase falleth shall be unclean; whether it be oven, or ranges for pots, they shall be broken down: for they are unclean, and shall be unclean unto you.

Nevertheless a fountain or pit, wherein there is plenty of water, shall be clean: but that which toucheth their carcase shall be unclean.

And if any part of their carcase fall upon any sowing seed which is to be sown, it shall be clean.

But if any water be put upon the seed, and any part of their carcase fall thereon, it shall be unclean unto you.