Albert Barnes Commentary Joshua 13:2

"This is the land that yet remaineth: all the regions of the Philistines, and all the Geshurites;" — Joshua 13:2 (ASV)

This and Joshua 13:3 name the still unconquered districts in the southern half of the land, Joshua 13:4–6 those in the north.

Geshuri - A district on the south of Philistia, the inhabitants of which are again named in 1 Samuel 27:8; but are not to be confounded with the land of the Geshurites mentioned in Joshua 13:13; Joshua 12:5.