Joshua 15:63

The Jebusites, the inhabitants of Jerusalem Jerusalem was in part taken by Joshua before this; but the upper and stronger part of it, called Zion, was still held by the Jebusites, even till David's time. And, it is probable, they descended from thence to the lower town, called Jerusalem, and took it; so that the Israelites were obliged to win it a second, yea, and a third time also. For afterward it was possessed by the Jebusites, Judges 19:11; 2 Samuel 5:6; 2 Samuel 5:7. The children of Judah could not, &c. A part of Jerusalem was in the tribe of Judah, namely, the tower of Zion, mount Moriah, with some of the south parts adjacent; the rest of it was in the tribe of Benjamin, namely, the greatest part of the city itself. So that it was inhabited promiscuously by them both. They could not drive them out because of their unbelief; as Christ could do no mighty work because of the people's unbelief, Mark 6:5; and because of their sloth, cowardice, and wickedness, whereby they forfeited God's help. The Jebusites dwell at Jerusalem unto this day When this book was written, whether in Joshua's life, which continued many years after the taking of Jerusalem, or after his death, when this clause was added, as others were elsewhere in this book, by some other man of God, which must have been done before David's time, because then the Jebusites were quite expelled and their fort taken.