21 And the sons of Izhar; Korah, and Nepheg, and Zichri.

22 And the sons of Uzziel; Mishael, and Elzaphan, and Zithri.

23 And Aaron took him Elisheba, daughter of Amminadab, sister of Naashon, to wife; and she bare him Nadab, and Abihu, Eleazar, and Ithamar.

24 And the sons of Korah; Assir, and Elkanah, and Abiasaph: these are the families of the Korhites.

25 And Eleazar Aaron’s son took him one of the daughters of Putiel to wife; and she bare him Phinehas: these are the heads of the fathers of the Levites according to their families.

In these verses we hear the children of Izhar and Uzziel, who were Moses and Aaron’s uncles, and the sons of Korah, who was Moses and Aaron’s cousin. More importantly, we also hear the names of Aaron’s sons and his grandson, all of whom would be integral to the law that God would lay forth. Through Moses, God would establish the priestly office and detail its responsibilities. This office would first fall to Aaron and his sons, and then to their descendants, ultimately turning the entire Levitical tribe into a priest class in Israel.

The tribe of the Levites would serve exclusively in this function, being the only ones authorized to perform the priestly duties until the advent of Jesus Christ, who was of the tribe of Judah. Christ would extend the priestly responsibility to any worthy man who was called to it, regardless of his heritage. For now, though, it would be approximately 1,600 years that the Levites would carry this duty alone.