Numbers 34:3

Your southern side will be from the Wilderness of Zin along the boundary of Edom. Your southern border on the east will begin at the east end of the Dead Sea.

Genesis 14:3

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

Ezekiel 47:13

This is what the Lord God says: “This is the border you will use to divide the land as an inheritance for the 12 tribes of Israel. Joseph will receive two shares.

Exodus 23:31

I will set your borders from the Red Sea to the Mediterranean Sea, and from the wilderness to the Euphrates River. For I will place the inhabitants of the land under your control, and you will drive them out ahead of you.

Joshua 3:16

and the water flowing downstream stood still, rising up in a mass that extended as far as Adam, a city next to Zarethan. The water flowing downstream into the Sea of the Arabah (the Dead Sea) was completely cut off, and the people crossed opposite Jericho.

Joshua 15:1-12

Now the allotment for the tribe of the descendants of Judah by their clans was in the southernmost region, south to the Wilderness of Zin and over to the border of Edom.

Ezekiel 47:8

He said to me, “This water flows out to the eastern region and goes down to the Arabah. When it enters the sea, the sea of foul water, the water of the sea becomes fresh.

Ezekiel 47:18-23

On the east side it will run between Hauran and Damascus, along the Jordan between Gilead and the land of Israel; you will measure from the northern border to the eastern sea. This will be the eastern side.

Treasury of Scripture Knowledge

Summary

Then your south quarter shall be from the wilderness of Zin along by the coast of Edom, and your south border shall be the outmost coast of the salt sea eastward:

Bible References

South quarter

Exodus 23:31
I will set your borders from the Red Sea to the Mediterranean Sea, and from the wilderness to the Euphrates River. For I will place the inhabitants of the land under your control, and you will drive them out ahead of you.
Joshua 15:1
Now the allotment for the tribe of the descendants of Judah by their clans was in the southernmost region, south to the Wilderness of Zin and over to the border of Edom.
Ezekiel 47:13
This is what the Lord God says: “This is the border you will use to divide the land as an inheritance for the 12 tribes of Israel. Joseph will receive two shares.

Salt sea eastward

Joshua 3:16
and the water flowing downstream stood still, rising up in a mass that extended as far as Adam, a city next to Zarethan. The water flowing downstream into the Sea of the Arabah (the Dead Sea) was completely cut off, and the people crossed opposite Jericho.
Joshua 15:2
Their southern border began at the tip of the Dead Sea on the south bay
Ezekiel 47:8
He said to me, “This water flows out to the eastern region and goes down to the Arabah. When it enters the sea, the sea of foul water, the water of the sea becomes fresh.

Holman Christian Standard Bible®, Copyright © 1999, 2000, 2002, 2003, 2009 by Holman Bible Publishers.