Charles Ellicott Commentary Joshua 15:9

"and the border extended from the top of the mountain unto the fountain of the waters of Nephtoah, and went out to the cities of mount Ephron; and the border extended to Baalah (the same is Kiriath-jearim);" — Joshua 15:9 (ASV)

Kirjath-jearim is by Conder identified as ’Arma (spelt ’Erma on the Ordnance map), four miles east of Beth-shemesh (’Ain Shemes, or Shems).