Joshua 18:14-15

14— And the border reached along and turned on the west side, southward from the hill that is before Beth-horon southward; and ended at Kirjath-Baal, which is Kirjath-jearim, a city of the children of Judah: this is the west side.

15— And the south side was from the extreme end of Kirjath-jearim, and the border went out on the west, and went out to the spring of the waters of Nephtoah.