Leviticus 11:35-38

³⁵And every thing whereupon any part of their carcass falleth shall be unclean; whether oven, or range for pots, it shall be broken in pieces: they are unclean, and shall be unclean unto you.

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.