Leviticus 5
4 Ref "'Or if anyone swears rashly with his lips to do evil, or to do good, whatever it is that a man might utter rashly with an oath, and it is hidden from him; when he knows of it, then he shall be guilty of one of these.
5 Ref It shall be, when he is guilty of one of these, he shall confess that in which he has sinned:
6 Ref and he shall bring his trespass offering to Yahweh for his sin which he has sinned, a female from the flock, a lamb or a goat, for a sin offering; and the priest shall make atonement for him concerning his sin.