Leviticus 5:2-7

2or if any one touch any unclean thing, whether it be the carcase of an unclean beast, or the carcase of unclean cattle, or the carcase of unclean creeping things, and it be hidden from him, and he be unclean, then he shall be guilty:

3or if he touch the uncleanness of man, whatsoever his uncleanness be wherewith he is unclean, and it be hid from him; when he knoweth of it, then he shall be guilty:

4or if any one swear rashly with his lips to do evil, or to do good, whatsoever it be that a man shall utter rashly with an oath, and it be hid from him; when he knoweth of it, then he shall be guilty in one of these things:

5and it shall be, when he shall be guilty in one of these things, that he shall confess that wherein he hath sinned:

6and he shall bring his guilt offering unto the LORD for his sin which he hath sinned, a female from the flock, a lamb or a goat, for a sin offering; and the priest shall make atonement for him as concerning his sin.

7And if his means suffice not for a lamb, then he shall bring his guilt offering for that wherein he hath sinned, two turtledoves, or two young pigeons, unto the LORD; one for a sin offering, and the other for a burnt offering.