And Johanan begat Azariah, (he it is that executed the {b} priest's office in the temple that Solomon built in Jerusalem:)

(b) And valiantly resisted king Uzziah, who would have usurped the priest's office 2Ch 26:17,18.

Wesley's Notes

6:10 The priest's office - So did all the rest, but it is implied that he did it worthily, he filled his place, and valiantly discharged his office in Uzziah's time. Solomon built - In Solomon's temple; so called to distinguish it from the second temple which was built or in building when these books were written.

King James Translators' Notes

in the temple: Heb. in the house

Jamieson-Fausset-Brown Bible Commentary

10. he it is that executed the priest's office in the temple that Solomon built in Jerusalem-It is doubtful whether the person in favor of whom this testimony is borne be Johanan or Azariah. If the former, he is the same as Jehoiada, who rendered important public services (2Ki 11:1-20); if the latter, it refers to the worthy and independent part he acted in resisting the unwarrantable encroachments of Uzziah (2Ch 26:17).

in the temple that Solomon built in Jerusalem-described in this particular manner to distinguish it from the second temple, which was in existence at the time when this history was written.

Matthew Henry's Concise Commentary

6:1-81 Genealogies. - We have an account of Levi in this chapter. The priests and Levites were more concerned than any other Israelites, to preserve their descent clear, and to be able to prove it; because all the honours and privileges of their office depended upon their descent. Now, the Spirit of God calls ministers to their work, without any limit as to the families they came from; and then, as now, though believers and ministers may be very useful to the church, none but our great High Priest can make atonement for sin, nor can any be accepted but through his atonement.