Numbers 34:12

then south along the Jordan River to the Dead Sea. These will be the four borders of your land.

Numbers 34:3

The southern border will extend from the wilderness of Zin along the border of Edom. It will begin on the east at the southern end of the Dead Sea.

Genesis 13:10

Lot looked up and saw that the district of the Jordan River was well watered, like the garden of Jehovah, like the land of Egypt, toward Zoar. This was before Jehovah destroyed Sodom and Gomorrah.

Genesis 14:3

These joined forces in the Valley of Siddim at the Dead Sea.

Genesis 19:24-26

Jehovah made burning sulfur and fire rain out of the sky on Sodom and Gomorrah.

Treasury of Scripture Knowledge

Summary

And the border shall go down to Jordan, and the goings out of it shall be at the salt sea: this shall be your land with the coasts thereof round about.

General references

Bible References

The salt sea

Numbers 34:3
The southern border will extend from the wilderness of Zin along the border of Edom. It will begin on the east at the southern end of the Dead Sea.
Genesis 13:10
Lot looked up and saw that the district of the Jordan River was well watered, like the garden of Jehovah, like the land of Egypt, toward Zoar. This was before Jehovah destroyed Sodom and Gomorrah.
Genesis 14:3
These joined forces in the Valley of Siddim at the Dead Sea.
Genesis 19:24
Jehovah made burning sulfur and fire rain out of the sky on Sodom and Gomorrah.

General references

Joshua 15:5
The east border was the salt sea to the end of Jordan. Their border in the north quarter was from the bay of the sea at the uttermost part of Jordan: