Leviticus 11:35-38

³⁵Anything that one of their carcasses falls on becomes unclean; if it is an oven or small stove, it must be broken to pieces. They are unclean and they must remain unclean to you.

³⁶A spring or cistern for collecting water remains clean; but anyone who touches their carcass is unclean.

³⁷If any part of their carcass falls upon any seeds for planting, those seeds will still be clean.

³⁸But if water is put on the seeds, and if any part of their carcass falls on them, then they will be unclean to you.