God instructed Moshe to command Aaron and the priests regarding the protocols of the sacrifices, known as "karbanos." The burnt offering, or "Olah," would be consumed on the altar until morning, followed by a priest removing ashes outside the camp. The priests were tasked with maintaining the fire daily by adding wood. As for the meal offering, or "minchah," a portion was to be burnt on the altar, while the priests consumed the remainder as unleavened cakes within the Tent of Meeting. During the High Priest's anointment, the meal offering was to be uniquely prepared and entirely burnt on the altar.
The sin offering, or "chatas," required slaughtering at the same location as the burnt offering, with the offering priest consuming it in the Tent of Meeting. Earthen vessels used for cooking sin offerings were to be broken, while copper vessels could be rinsed and reused. If the blood of the sin offering were brought into the Tent of Meeting for expiation, the entire offering would be burnt on the altar. The guilt offering, or "asham," involved slaughtering at the same location as the burnt offering, followed by blood application on the altar by the priest, burning of specific parts, and consumption of the remaining meat by the offering priest in the Tent of Meeting. The priest who presented a burnt offering retained the skin. The offering priest consumed baked or grilled meal offerings, while other offerings were shared among all priests. In the case of a peace offering, or "shelamim," for thanksgiving, unleavened cakes or wafers with oil were provided and given to the priest who applied the blood of the peace offering. All meat from the peace offering had to be consumed on the day of the offering. If offered as a votive or freewill offering, the meat could be eaten for two days, with any remaining meat on the third day to be burned. Meat that came into contact with impurities could not be consumed and had to be burnt. Only impure individuals were prohibited from eating meat from peace offerings under the penalty of exile. Consumption of fat or blood was also forbidden under the penalty of exile.
The individual offering the peace offering had to present the offering and its fat personally, with the fat burnt on the altar, the breast given to the priests, and the right thigh allocated to the offering priest. God instructed Moshe to assemble the entire community at the entrance of the Tent of Meeting for the priests' ordination. Moshe then presented Aaron and his sons, cleansing and vesting Aaron. Subsequently, Moshe anointed and sanctified the Tabernacle and its contents, blessing Aaron and his sons. In the next phase, Moshe offered a bull for a sin sacrifice, with Aaron and his sons laying hands on it before slaughter. The blood was applied to the altar, and the sacrificial portions were burned. A ram was then brought forth for a burnt offering, with similar rituals observed. Following this, a second ram was offered for ordination, with a specific application of blood on Aaron and his sons. The prescribed offerings were meticulously performed, culminating in a seven-day ordination period at the Tent of Meeting, in complete obedience to God's commands through Moses.