Leviticus 5:2
Or if a soul touch any unclean thing, whether it be a carcass of an unclean beast, or a carcass of unclean cattle, or the carcass of unclean creeping things, and if it be hidden from him; he also shall be unclean, and guilty.
Torrey's Topical Textbook—AKJV

Leviticus 11:24-28
And for these you shall be unclean: whoever touches the carcass of them shall be unclean until the even.
Torrey's Topical Textbook—AKJV