Numbers 34:3, 10-12

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 ye shall mark out your east border from Hazar-enan to Shepham; and the border shall go down from Shepham to Riblah, on the east side of Ain; and the border shall go down, and shall reach unto the side of the sea of Chinnereth eastward; and the border shall go down to the Jordan, and the goings out thereof shall be at the Salt Sea. This shall be your land according to the borders thereof round about.