Leviticus 5:2-3

“Or if you touch anything ritually unclean, like the carcass of an unclean animal, wild or domestic, or a dead reptile, and you weren’t aware of it at the time, but you’re contaminated and you’re guilty; “Or if you touch human uncleanness, any sort of ritually contaminating uncleanness, and you’re not aware of it at the time, but later you realize it and you’re guilty