Joshua 18:13-14

13 From there the boundary passes along southward in the direction of Luz, to the shoulder of a Luz (that is, Bethel), then the boundary goes down to b Ataroth-addar, on the mountain that lies south of Lower c Beth-horon. 14 Then the boundary goes in another direction, turning on the d western side southward from the mountain that lies to the south, opposite Beth-horon, and it ends at Kiriath-baal ( e that is, Kiriath-jearim), a city belonging to the people of Judah. This forms the western side.
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