But the people of Benjamin did not drive out the Jebusites who lived in Jerusalem, so the Jebusites have lived with the people of Benjamin in Jerusalem to this day.
We are here told upon what terms the rest of the tribes stood with the Canaanites that remained. I. Benjamin neglected to drive the Jebusites out of that part of the city of Jerusalem which fell to their lot, Jdg 1:21. Judah had set them a good example, and gained them great advantages by what they did (Jdg 1:9), but they did not follow the blow for want of resolution.
Commenting on Judges 1:21-36
And the children of Benjamin did not drive out the Jebusites that inhabited Jerusalem,.... That is, that part of it which belonged to them, for it lay between Judah and Benjamin; and neither of them separately, nor both conjunctly, could drive out the Jebusites from it, particularly the strong hold on the top of Mount Sion, which they held to the times of David.
the children of Benjamin did not drive out the Jebusites that inhabited Jerusalem--Judah had expelled the people from their part of Jerusalem (Jdg 1:8). The border of the two tribes ran through the city--Israelites and natives must have been closely intermingled.