Joshua 15:8-12

Then the border went up the Valley of Ben-hinnom to the slope of the Jebusite on the south (that is, Jerusalem); and the border went up to the top of the mountain which is opposite the Valley of Hinnom to the west, which is at the end of the Valley of Rephaim toward the north.

And from the top of the mountain the border turned to the spring of the waters of Nephtoah and proceeded to the cities of Mount Ephron, then the border turned to Baalah (that is, Kiriath-jearim).

The border turned from Baalah westward to Mount Seir, and continued to the slope of Mount Jearim on the north (that is, Chesalon), and went down to Beth-shemesh and continued through Timnah.

Then the border proceeded to the side of Ekron northward. And the border turned to Shikkeron and continued to Mount Baalah and proceeded to Jabneel, and the border ended at the sea.

The western border was at the Great Sea, even its coastline. This is the border around the sons of Judah according to their families.