Leviticus 5:2-4

New Life Version

² If a person touches anything that is unclean, the dead body of a wild animal, or of cattle, or of anything that moves on the earth that is unclean, even without knowing it, then he will be unclean and will be guilty. ³ Or if he touches a human who is unclean for whatever reason, without knowing it, when he learns about it, he will be guilty. ⁴ If a person without thinking swears he will do something, whether bad or good, any foolish promise a person may swear, when he learns about it, he will be guilty.