Joshua 15:5

And the east border was the salt sea, even unto the end of Jordan ,.... To the place where Jordan fell into it; so that this border was the whole length of the salt sea, which Josephus says F25 De Bello Jud. l. 4. c. 8. sect. 4. was five hundred eighty furlongs; and, according to Pliny F26 Nat. Hist. l. 5. c. 16. , an hundred miles:

and their border in the north quarter was from the bay of the sea ,

at the uttermost part of Jordan ; this northern border began where the eastern ended, at the bay or creek of the sea, where Jordan fell into it.