Leviticus 11:38-40

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.

³⁹If any animal that you may eat dies, then he who touches the carcass will be unclean until evening.

⁴⁰Whoever eats any of that carcass must wash his clothes and be unclean until evening. Anyone who picks up such a carcass will wash his clothes and be unclean until evening.