Leviticus 11:36-39

³⁶Nevertheless a fountain or a pit wherein is a gathering of water shall be clean: but that which toucheth their carcass shall be unclean.

³⁷And if aught of their carcass fall upon any sowing seed which is to be sown, it is clean.

³⁸But if water be put upon the seed, and aught of their carcass fall thereon, it is unclean unto you.

³⁹And if any beast, of which ye may eat, die; he that toucheth the carcass thereof shall be unclean until the even.