Leviticus 11:38

36Nevertheless a spring or a cistern in which water is gathered shall be clean, but that which touches their carcass shall be unclean.

37If part of their carcass falls on any sowing seed which is to be sown, it is clean.

38But if water is put on the seed, and part of their carcass falls on it, it is unclean to you.

39“‘If any animal of which you may eat dies, he who touches its carcass shall be unclean until the evening.

40He who eats of its carcass shall wash his clothes, and be unclean until the evening. He also who carries its carcass shall wash his clothes, and be unclean until the evening.