Numbers 34:3, 6, 9-10

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

And as for the western border, ye shall even have the great sea for a border: this shall be your west border.

and the border shall go on to Ziphron, and the goings out of it shall be at Hazar-enan: this shall be your north border. And ye shall point out your east border from Hazar-enan to Shepham