Leviticus 5:4-6

LITV(i) 4 Or if a person swears, speaking rashly with the lips, to do evil, or to do good, anything which the man speaks rashly with an oath. and it is hidden from him, and he knows, then he is guilty of one of these. 5 And it shall be when he is guilty of one of these, then he shall confess that in which he has sinned. 6 And he shall bring his guilt offering to Jehovah for his sin which he has sinned, a female out of the flock, a lamb, or a doe of the goats, for a sin offering. And the priest shall atone for him regarding his sin.