The end of the reign of King David (1 Chr 29:26-29:30)

“Thus King David son of Jesse reigned over all Israel. The period that he reigned over Israel was forty years. He reigned seven years in Hebron, and thirty-three years in Jerusalem. He died in a good old age, full of days, riches, and honor. His son Solomon succeeded him. Now the acts of King David, from first to last, are written in the records of the seer Samuel, and in the records of the prophet Nathan, and in the records of the seer Gad. These have the accounts of his whole rule and his might. They have the events that befell him and Israel and all the kingdoms of the earth.”

King David ended his 40 year reign, like the 40 years in the wilderness of Moses. They never forgot that the first 7 years were in Hebron where there was some contention about his rule. The last 33 were in Jerusalem. Without mentioning how old he was, this biblical author said that he lived a good old age, with richness and honors. He was probably in his 60s or early 70s. King Solomon succeeded him. King Solomon was actually king before King David died. This biblical author then cites his sources. The records of the seer Samuel may be referring to the Books of Samuel. It is not clear what the records of the prophet Nathan and the seer Gad were. They were both contemporaries of King David. Perhaps, they wrote something that has been lost. There is no indication about 1 Kings, which was more about Solomon. Certainly this author used sources for his genealogies. Perhaps there were other writings that have disappeared. He made no mention of the Annuals or Chronicles of the kings of Judah and Israel here.