Amram’s sons: Aaron and Moses. Aaron, along with his descendants, was set apart forever to consecrate the most holy things, to burn incense in the presence of Yahweh, to minister to Him, and to pronounce blessings in His name forever.
But Aaron and his sons did all the work of the most holy place. They presented the offerings on the altar of burnt offerings and on the altar of incense to make atonement for Israel according to all that Moses the servant of God had commanded.
But when he became strong, he grew arrogant and it led to his own destruction. He acted unfaithfully against the Lord his God by going into the Lord’s sanctuary to burn incense on the incense altar.
just as the Lord commanded him through Moses. It was to be a reminder for the Israelites that no unauthorized person outside the lineage of Aaron should approach to offer incense before the Lord and become like Korah and his followers.
Out of all the tribes of Israel, I selected your house to be priests, to offer sacrifices on My altar, to burn incense, and to wear an ephod in My presence. I also gave your house all the Israelite fire offerings.