From the hill facing Beth Horon on the south the boundary turned south along the western side and came out at Kiriath Baal (that is, Kiriath Jearim), a town of the people of Judah. This was the western side.
NIV
The boundary extended from there, and turning about on the western side southward from the mountain that lies to the south opposite Beth-horon, it ended at Kiriath-baal (that is, Kiriath-jearim), a city of the tribe of Judah. This formed the western side [of Benjamin's territory].
AMP
And the border was drawn thence, and compassed the corner of the sea southward, from the hill that lieth before Bethhoron southward; and the goings out thereof were at Kirjathbaal, which is Kirjathjearim, a city of the children of Judah: this was the west quarter.
KJV