Their southern border started at the southern tip of the Salt Sea, ¹ 

Ephraim’s territory was to the south, and Manasseh’s to the north. The sea was Manasseh’s ¹  western border and their territory ²  touched Asher on the north and Issachar on the east.

It then turned on the west side southward from the hill near Beth Horon on the south and extended to Kiriath Baal (that is, Kiriath Jearim), a city belonging to the tribe ¹  of Judah. This is the western border. ² 

The land allotted to the tribe of Judah by its clans reached to the border of Edom, to the Wilderness of Zin in the Negev far to the south. ¹ 

The southern side started on the edge of Kiriath Jearim and extended westward to the spring of the waters of Nephtoah.

The border then descended southward to the Valley of Kanah. Ephraim was assigned cities there among the cities of Manasseh, ¹  but the border of Manasseh was north of the valley and ended at the sea.

It then crossed from there to Luz, to the slope of Luz to the south (that is, Bethel), ¹  and descended to Ataroth Addar located on the hill that is south of lower Beth Horon.

The border then descended to the edge of the hill country near the Valley of Ben Hinnom located in the Valley of the Rephaites to the north. It descended through the Valley of Hinnom to the slope of the Jebusites to the south and then down to En Rogel.

It then crossed to the slope of Beth Hoglah to the north and ended at the northern tip of the Salt Sea ¹  at the mouth of the Jordan River. ²  This was the southern border.