Only Aaron and his descendants were allowed to offer sacrifices and incense on the two altars at the sacred tent. They were in charge of the most holy place and the ceremonies to forgive sins, just as God's servant Moses had commanded.
After Aaron's death, his priestly clothes are to be handed down to each descendant who succeeds him as high priest, and these clothes must be worn during the seven-day ceremony of ordination.
Send for Aaron and his sons, as well as their priestly clothes, the oil for ordination, the bull for the sin offering, the two rams, and a basket of bread made without yeast.