Deuteronomy 4:49

together with all the Arabah on the east side of the Jordan as far as the Sea of the Arabah , under the slopes of Pisgah .

and included all the Arabah east of the Jordan, as far as the Dead Sea, below the slopes of Pisgah.

And all the plain on this side Jordan eastward, even unto the sea of the plain, under the springs of Pisgah. Deuteronomy 3 Books Deuteronomy 5