Joshua 15:2

Their south border was from the lower end of the Salt Sea, from the bay that turns to the south.

Genesis 14:3

All these came as allies to the valley of Siddim (that is, the Salt Sea).

Numbers 34:3

Your southern sector shall extend from the wilderness of Zin along the side of Edom, and your southern border shall extend from the end of the Salt Sea eastward.

Joshua 3:16

the waters which were flowing down from above stood and rose up in one heap, a great distance away at Adam, the city that is beside Zarethan; and those which were flowing down toward the sea of the Arabah, the Salt Sea, were completely cut off. So the people crossed opposite Jericho.

Isaiah 11:15

And the Lord will utterly destroy
The tongue of the Sea of Egypt;
And He will wave His hand over the River
With His scorching wind;
And He will strike it into seven streams
And make men walk over dry-shod.

Ezekiel 47:8

Then he said to me, “These waters go out toward the eastern region and go down into the Arabah; then they go toward the sea, being made to flow into the sea, and the waters of the sea become fresh.

Ezekiel 47:18

“The east side, from between Hauran, Damascus, Gilead and the land of Israel, shall be the Jordan; from the north border to the eastern sea you shall measure. This is the east side.

Treasury of Scripture Knowledge

Summary

And their south border was from the shore of the salt sea, from the bay that looketh southward:

Bible References

The salt sea

Joshua 3:16
the waters which were flowing down from above stood and rose up in one heap, a great distance away at Adam, the city that is beside Zarethan; and those which were flowing down toward the sea of the Arabah, the Salt Sea, were completely cut off. So the people crossed opposite Jericho.
Genesis 14:3
All these came as allies to the valley of Siddim (that is, the Salt Sea).
Numbers 34:3
Your southern sector shall extend from the wilderness of Zin along the side of Edom, and your southern border shall extend from the end of the Salt Sea eastward.
Ezekiel 47:8
Then he said to me, “These waters go out toward the eastern region and go down into the Arabah; then they go toward the sea, being made to flow into the sea, and the waters of the sea become fresh.