Deuteronomy 4:48

46On this side Jordan, in the valley over against Bethpeor, in the land of Sihon king of the Amorites, who dwelt at Heshbon, whom Moses and the children of Israel smote, after they were come forth out of Egypt:

47And they possessed his land, and the land of Og king of Bashan, two kings of the Amorites, which were on this side Jordan toward the sunrising;

48From Aroer, which is by the bank of the river Arnon, even unto mount Sion, which is Hermon,

49And all the plain on this side Jordan eastward, even unto the sea of the plain, under the springs of Pisgah.