Leviticus 4:27-5:10, from Parshat Vayikra.

If any person from among the populace unwittingly incurs guilt by doing any of the things which by the Lord's commandments ought not to be done, and he realizes his guilt--or the sin of which he is guilty is brought to his knowledge--he shall bring a female goat without blemish as his offering for the sin of which he is guilty. He shall lay his hand upon the head of the sin offering, and the sin offering shall be slaughtered at the place of the burnt offering. The priest shall take with his finger some of its blood and put it on the horns of the altar of burnt offering; and all the rest of its blood he shall pour out at the base of the altar. He shall remove all its fat, just as the fat is removed from the sacrifice of well-being; and the priest shall turn it into smoke on the altar, for a pleasing odor to the Lord. Thus the priest shall make expiation for him, and he shall be forgiven. If the offering he brings as a sin offering is a sheep, he shall bring a female without blemish. He shall lay his hand upon the head of the sin offering, and it shall be slaughtered as a sin offering at the spot where the burnt offering is slaughtered. The priest shall take with his finger some of the blood of the sin offering and put it on the horns of the altar of burnt offering, and all the rest of its blood he shall pour out at the base of the altar. And all its fat he shall remove just as the fat of the sheep of the sacrifice of well-being is removed; and this the priest shall turn into smoke on the altar, over the Lord's offering by fire. Thus the priest shall make expiation on his behalf for the sin of which he is guilty, and he shall be forgiven. If a person incurs guilt--when he has heard a public imprecation and--although able to testify as one who has either seen or learned of the matter--he does not give information, so that he is subject to punishment; or when a person touches any unclean thing--be it the carcass of an unclean beast or the carcass of unclean cattle or the carcass of an unclean creeping thing--and the fact has escaped him, and then, being unclean, he realizes his guilt; Or when he touches human uncleanness--any such uncleanness whereby one becomes unclean--and, though he has known it, the fact has escaped him, but later he realizes his guilt; or when a person utters an oath to bad or good purpose--whatever a man may utter in an oath--and, though he has known it, the fact has escaped him, but later he realizes his guilt in any of these matters--when he realizes his guilt in any of these matters, he shall confess that wherein he has sinned. And he shall bring as his penalty to the Lord, for the sin of which he is guilty, a female from the flock, sheep or goat, as a sin offering; and the priest shall make expiation on his behalf for his sin. But if his means do not suffice for a sheep, he shall bring to the Lord, as his penalty for that of which he is guilty, two turtledoves or two pigeons, one for a sin offering and the other for a burnt offering. He shall bring them to the priest, who shall offer first the one for the sin offering, pinching its head at the nape without severing it. He shall sprinkle some of the blood of the sin offering on the side of the altar, and what remains of the blood shall be drained out at the base of the altar; it is a sin offering. And the second he shall prepare as a burnt offering, according to regulation. Thus the priest shall make expiation on his behalf for the sin of which he is guilty, and he shall be forgiven.