3 descended westward to the territory of the Japhletites as far as the region of Lower Beth Horon and on to Gezer, ending at the Mediterranean Sea.

Read Joshua 16:3 Using Other Translations

And goeth down westward to the coast of Japhleti, unto the coast of Bethhoron the nether, and to Gezer: and the goings out thereof are at the sea.
Then it goes down westward to the territory of the Japhletites, as far as the territory of Lower Beth-horon, then to Gezer, and it ends at the sea.
Then it descended westward to the territory of the Japhletites as far as Lower Beth-horon, then to Gezer and over to the Mediterranean Sea.