Numbers 34:3, 6, 9-10

then your south quarter shall be from the wilderness of Zin along by the side of Edom, and your south border shall be from the end of the Salt Sea eastward

And for the western border, ye shall have the great sea and the border thereof: this shall be your west border.

and the border shall go forth to Ziphron, and the goings out thereof shall be at Hazar-enan: this shall be your north border. And ye shall mark out your east border from Hazar-enan to Shepham