Leviticus 5:1-2

Revised Geneva Translation

5 “Also, if anyone has sinned—if he has heard the voice of an oath—and he can witness to it (whether he has seen or known of it) and does not do so, he shall be guilty.

² “Or if anyone touches any unclean thing—whether it is a carcass of an unclean beast or a carcass of unclean cattle or a carcass of unclean creeping things—and is not aware of it, he is still unclean and has offended.