In the days of Herod, king of Judaea, there was a certain priest, by name Zacharias, of the order of Abijah; and he had a wife of the family of Aaron, and her name was Elisabeth.

who was a descendant of Aaron. They were both righteous in the sight of the Lord, walking in all the commandments and ordinances of the law, blameless.

the son of Salmon, the son of Naasson, The son of Aminadab, the son of Aaron, the son of Esrom, the son of Phares, the son of Judah,

They told Aaron:

Make us gods who will go before us. As for this Moses who brought us out of the land of Egypt, we don’t know what’s happened to him.

And not any man takes the honor to himself, but being called by God, just as also Aaron.

Now if perfection had been reached through the Levitical priesthood -- for on it as a basis even the law was enacted for the people-- what further need would there have been of appointing a different priest, with the rank of Melchizedek, instead of designating one with the rank of Aaron?

having a golden altar of incense, and the ark of the covenant overlaid round about with gold, wherein was a golden pot holding the manna, and Aaron's rod that budded, and the tables of the covenant;