1 Chronicles 6:10
And Johanan begat Azariah, (he it is that executed the priest’s office in the temple that Solomon built in Jerusalem:) And Johanan begat Azariah, (he it is that executed the priest’s office in the temple that Solomon built in Jerusalem:)
This verse stands in the genealogy of Levi and his priestly descendants in 1 Chronicles 6, within the long record of names and chronology in 1 Chronicles 4-19 and the section of chapters 5-7.
Many verses here simply name people rather than express promises.
The value of such detailed genealogies may not be immediately clear to every reader, yet they can reward study and hold interest for people with different knowledge and abilities.
They preserved the records of God's children and the integrity of the tribes and provided legal proof of hereditary descent needed to maintain the temple service through those whose family line entitled them to serve, thus guarding the prerogatives of the priesthood.
The genealogy of the tribe of Judah was kept especially carefully because Christ came through Judah.
The fuller priestly lineage from Aaron onward in 1 Chronicles 6:3-15 is later repeated by Ezra in shortened form with several generations dropped, the omission being deliberate rather than from ignorance.
This shows the Hebrew habit of compressing a genealogical series by giving part for the whole, mentioning only selected ancestors to show relation to a remote ancestor, so chronology cannot be calculated by assuming the shorter series is complete.
Catalogues like this were kept with exceeding care to guard the fulfillment of prophecies and promises, especially Messianic hopes, yet a complete unrolling of every link was not always required.
The priestly genealogy in this chapter is one of the family records that remained unbroken until Christ's first advent, reflecting the continuation of the Aaronic priesthood until the Jewish nation ceased and Christ's priesthood superseded it.
The genealogies preserve people's names across generations and show that even those forgotten by others are remembered by God, which can bring comfort to people who feel overlooked or like failures.