Leviticus [Pertaining to Levites] 5:2-6

²“‘Or if anyone touches any unclean thing, whether it is the carcass of an unclean animal, or the carcass of unclean livestock, or the carcass of unclean creeping things, and it is hidden from him, and he is unclean, then he shall be guilty.

³“‘Or if he touches the uncleanness of man, whatever his uncleanness is with which he is unclean, and it is hidden from him; when he knows of it, then he shall be guilty.

⁴“‘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.

⁵It shall be, when he is guilty of one of these, he shall yadah ·extend hands in confession· of that in which he has sinned:

⁶and he shall bring his trespass offering to Adonai 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.