Joshua 15:63

As for The Author closes the catalogue of the cities of Judah with an announcement that the children of this royal tribe failed to drive out the Jebusites from Jerusalem.

the Jebusites The Jebusites are noticed above, ch. Joshua 10:1, and ch. Joshua 11:3. They were a strong mountain-tribe, and as long as the "Upper City" remained in their hands they practically had possession of the whole. The children of Judah, as also the children of Benjamin, took and burnt the "Lower City," but relinquished the attempt to capture the "Upper City." (See Judges 1:8; Judges 1:21.)

unto this day It is plain from this that the Book of Joshua was written before the reign of David (1 Chronicles 11:3-9).