Leviticus 11:35-38

³⁵And everything on which there shall fall of their dead bodies shall be unclean; ovens and stands for jars shall be broken down: these are unclean, and they shall be unclean to you.

³⁶Only if the water be of fountains of water, or a pool, or confluence of water, it shall be clean; but he that touches their carcasses shall be unclean.

³⁷And if one of their carcasses should fall upon any sowing seed which shall be sown, it shall be clean.

³⁸But if water be poured on any seed, and one of their dead bodies fall upon it, it is unclean to you.