Numbers 34:12; Genesis 14:3; Joshua 15:2

12 And the border shall go down to the Jordan, and its limit shall be at nthe Salt Sea. This shall be your land as defined by its borders all around.

And all these joined forces in the Valley of Siddim (zthat is, the Salt Sea).

And their south boundary ran from the end of the hSalt Sea, from the bay that faces southward.