Leviticus 11:38-40

³⁸soothly if any man sheddeth or pour out the seed with water, and afterward the water is touched with dead bodies by themselves, it shall be defouled anon.

³⁹If a beast is dead, which it is leaveful to you to eat, he that toucheth the dead body thereof shall be unclean till to eventide;

⁴⁰and he that eateth thereof anything, either beareth it, shall wash his clothes, and shall be unclean till to eventide.