Chapter 3: Don’t Eat Blood of Fat
Peace offerings are made with animals that are without blemish. These animals are taken to the doors of the tabernacle where they are killed. Aaron and his priests then take the animal and sprinkle it around the altar where the animal will be burnt as a peace offering unto the Lord.
Israel is forbidden to eat blood or fat.
Chapter 4: Sinners are forgiven through sacrifice.
Those who sin ignorantly can bring a young bullock (sheep) without blemish before the priests in the tabernacle, as sin offering.
The animal is killed and then a priest dips his finger in the blood and sprinkles it seven times before the veil of the sanctuary. Blood will also be placed on the horns of the altar of sweet incense. The rest of the blood is to be poured into the bottom of the altar, and all the fat be removed from the bullock, to be burned with the skin on the altar.
Sins are forgiven through this method, the priests using this method are making atonement for the sins of the people.