Joshua 18:15-19

Then the south side was from the edge of Kiriath-jearim, and the border went westward and went to the fountain of the waters of Nephtoah.

Then the border went down to the edge of the hill which is in the Valley of Ben-hinnom, which is in the Valley of Rephaim northward; and it went down to the Valley of Hinnom, to the slope of the Jebusite southward, and went down to En-rogel.

Then it turned northward and went to En-shemesh, and went to Geliloth, which is opposite the ascent of Adummim, and it went down to the stone of Bohan the son of Reuben.

And it continued to the side in front of the Arabah northward, and went down to the Arabah.

Then the border continued to the side of Beth-hoglah northward; and the border ended at the north bay of the Salt Sea, at the south end of the Jordan. This was the southern border.