Leviticus 11:38-40

³⁸and when water is put on the seed, and any of its carcase hath fallen on it — unclean it is to you.

³⁹'And when any of the beasts which are to you for food dieth, he who is coming against its carcase is unclean till the evening;

⁴⁰and he who is eating of its carcase doth wash his garments, and hath been unclean till the evening; and he who is lifting up its carcase doth wash his garments, and hath been unclean till the evening.