12. Resumption of Ec 1:1, the intermediate verses being the introductory statement of his thesis. Therefore, "the Preacher" (Koheleth) is repeated.
      was king--instead of "am," because he is about to give the results of his past experience during his long reign.
      in Jerusalem--specified, as opposed to David, who reigned both in Hebron and Jerusalem; whereas Solomon reigned only in Jerusalem. "King of Israel in Jerusalem," implies that he reigned over Israel and Judah combined; whereas David, at Hebron, reigned only over Judah, and not, until he was settled in Jerusalem, over both Israel and Judah.

JFB.