'Southern' in the Bible

Then your south side shall be from the wilderness of Zin alongside of Edom, and your southern border shall be from the end of the salt sea eastward;

And their southern border was from the end of the salt sea, from the tongue that turns southward;

And she said, Give me a blessing; for thou hast given me a southern land; give me also springs of water. Then he gave her the upper springs and the lower springs.

and the border passed on to the side of Beth-hoglah on the north, and the border ended at the tongue of the salt sea northward, at the south end of the Jordan: this is the southern border.