The border on the east was the Dead Sea. It went north all the way to where the Jordan River enters the sea. The border on the north started at the bay of the Dead Sea. That’s where the Jordan River enters the sea.
From the hill that faces Beth Horon on the south the border turned south. Then the border went along the west side of the hill. It came to an end at Kiriath Jearim. That town belongs to the people of Judah. That was the border on the west.