Leviticus 4:2
"Tell the sons of Israel to do as follows with one who sins unintentionally against any of the LORD's commandments and does what is forbidden by them:

Numbers 15:24
and if it was done unintentionally without the knowledge of the congregation, then the whole congregation is to prepare one young bull as a burnt offering, a pleasing aroma to the LORD, with its grain offering and drink offering according to the regulation, and one male goat as a sin offering.