Thebookofthechronicles - This is not the book of Chronicles which we have now, no such list being found in it; but some other book or register, which is lost.
Matthew Henry
Concise Bible Commentary
It is a debt we owe to faithful ministers, to remember our guides, who have spoken to us the word of God. It is good to know what our godly predecessors were, that we may learn what we should be.
SDA Bible Commentary (limited)
Volume 1-7
23. The book of the chronicles. The document in which the list of Levites was originally included. This book was a day-by-day record of events of national importance, and was a continuation of the earlier annals of the kingdom.