Leviticus 5:17-19 - Unknown Trespass
17 "If anyone sins, and does any of the things which the LORD has commanded not to be done; though he did not know it, yet he is guilty, and shall bear his iniquity. 18 He shall bring a ram without blemish from of the flock, according to your estimation, for a trespass offering, to the priest; and the priest shall make atonement for him concerning the thing in which he sinned and did not know it, and he will be forgiven. 19 It is a trespass offering. He is certainly guilty before the LORD."