Deuteronomy 4:47-49

4:47 They possessed his land and that of King Og of Bashan – both of whom were Amorite kings in the Transjordan, to the east. 4:48 Their territory extended from Aroer at the edge of the Arnon valley as far as Mount Siyon – that is, Hermon – 4:49 including all the Arabah of the Transjordan in the east to the sea of the Arabah, beneath the watershed of Pisgah.)