Leviticus [Pertaining to Levites] 4:27-28

²⁷“‘If anyone of the common people sins unwittingly, and they have done something against any the mitzvot ·instructions· of Adonai concerning things which should not be done, they are guilty.

²⁸If his sin, which he has sinned, is made known to him, then he shall bring for his offering a goat, a female without defect, for his sin which he has sinned.