“On the eighth day, Moses summoned Aaron and his sons and the elders of Israel. He said to Aaron, ‘Take a bull calf for a sin offering, and a ram for a burnt offering, without blemish, and offer them before Yahweh’. Say to the people of Israel, ‘Take a male goat for a sin offering. Then a calf and a lamb, yearlings without blemish, for a burnt offering. Next, take an ox and a ram for an offering of well-being to sacrifice before Yahweh. Finally, a grain offering mixed with oil. Today Yahweh will appear to you.’ They brought what Moses commanded to the front of the tent of meeting. The whole congregation drew near and stood before Yahweh. Moses said, ‘This is the thing that Yahweh commanded you to do, so that the glory of Yahweh may appear to you.’ Then Moses said to Aaron, ‘Draw near to the altar, and sacrifice your sin offering and your burnt offering. Make atonement for yourself and for the people. Sacrifice the offering of the people. Make atonement for them, as Yahweh has commanded.”
Moses told Aaron on the 8th day that as new priests that they should make the following offerings: a sin offering, a burnt offering, and a well-being offering with the following elements:
1) A bull calf for a sin offering;
2) A ram for a burnt offering;
3) A male goat for a sin offering;
4) A calf and a lamb for a burnt offering;
5) An ox and a ram for a well-being offering;
6) A grain offering mixed with oil.
“Aaron drew near to the altar. He slaughtered the calf of the sin offering, which was for himself. The sons of Aaron presented the blood to him. He dipped his finger in the blood and put it on the horns of the altar. The rest of the blood he poured out at the base of the altar. However, the fat, the kidneys and the appendage of the liver from the sin offering he turned into smoke on the altar, as Yahweh commanded Moses. The flesh and the skin he burned with fire outside the camp.”
Aaron performed the sin offering for himself. He killed the calf, put blood on the horns of the altar and poured out the rest of the blood at the base of the altar. Then he took the fat and the entrails and burned it on the altar. Finally, he took the meat and the skin and burned it outside the camp.
“Then he slaughtered the burnt offering. Aaron’s sons brought him the blood. He dashed it against all sides of the altar. They brought him the burnt offering piece by piece. The head he turned into smoke on the altar. He washed the entrails and the legs and, with the burnt offering, turned them into smoke on the altar.”
Aaron performed the burnt offering. He dashed the blood on all sides of the altar. After burning the head on the altar, he washing the entrails and the legs, and burned them on the altar. .
“Next he presented the people’s offering. He took the goat of the sin offering that was for the people, and slaughtered it. He presented it as a sin offering, like the first one. He presented the burnt offering, and sacrificed it according to regulation. He presented the grain offering, and taking a handful of it turned it into smoke on the altar, in addition to the burnt offering of the morning.”
Aaron then presented the people’s sin offering. He killed the goat and followed all the procedures like he had done for himself. However, he also presented a grain offering on the altar.
“He slaughtered the ox and the ram as a sacrifice of well-being for the people. Aaron’s sons brought him the blood, which he dashed against all sides of the altar. They brought the fat of the ox and of the ram that is the broad tail, the fat which covers the entrails, the two kidneys and the fat of them, and the appendage of the liver. They first laid the fat on the breasts, and the fat was turned into smoke on the altar. The breasts and the right thigh Aaron raised as an elevation offering before Yahweh, as Moses commanded.”
Aaron then presented the well-being offering. He killed the ox and the ram. He dashed the blood on all sides of the altar. Then he took the fat including the entrails, kidneys and liver, and burned them on the altar. Finally he raised the breasts and right thigh as an elevation offering. All this was done as Moses had commanded him.
“Aaron lifted up his hands toward the people and blessed them. He came down from sacrificing the sin offering, the burnt offering, and the offering of well-being. Moses and Aaron entered into the tent of meeting. Then they came out and blessed the people. The glory of Yahweh appeared to all the people. Fire came out from Yahweh and consumed the burnt offering and the fat upon the altar. When all the people saw it, they shouted and fell on their faces.”
All these offerings were mentioned above in chapters 1-7. Apparently, Aaron and his sons performed them all on the same day at one time after the completion of their 7 day ordination. In each case, Aaron slaughtered the animal, poured the blood at the base of the altar, and burned the fat on the altar. This was a bloody massacre. Having done all these offerings or sacrifices, Moses and Aaron blessed all the people. Then the glory of Yahweh appeared and consumed all the brunt offerings and the grain offerings on the altar. All the people shouted out and fell on their faces.