Leviticus 5:2
2Or if a person touches anything unclean—whether the carcass of [any] unclean wild animal or livestock or crawling creature—even if he is unaware of it, he is unclean and guilty.
2Or if a person touches anything unclean—whether the carcass of [any] unclean wild animal or livestock or crawling creature—even if he is unaware of it, he is unclean and guilty.