Joshua 13:9

from Aroer, that is on the edge of the valley of the Arnon, and the city that is in the middle of the valley, and all the plain of Medeba unto Dibon;

Numbers 21:30

We have shot at them; Heshbon is perished even unto Dibon, And we have laid waste even unto Nophah, Which reacheth unto Medeba.

Joshua 13:16

And their border was from Aroer, that is on the edge of the valley of the Arnon, and the city that is in the middle of the valley, and all the plain by Medeba;

Deuteronomy 3:12

And this land we took in possession at that time: from Aroer, which is by the valley of the Arnon, and half the hill-country of Gilead, and the cities thereof, gave I unto the Reubenites and to the Gadites:

Deuteronomy 3:16

And unto the Reubenites and unto the Gadites I gave from Gilead even unto the valley of the Arnon, the middle of the valley, and the border thereof , even unto the river Jabbok, which is the border of the children of Ammon;

Joshua 12:2

Sihon king of the Amorites, who dwelt in Heshbon, and ruled from Aroer, which is on the edge of the valley of the Arnon, and the city that is in the middle of the valley, and half Gilead, even unto the river Jabbok, the border of the children of Ammon;

Isaiah 15:2

They are gone up to Bayith, and to Dibon, to the high places, to weep: Moab waileth over Nebo, and over Medeba; on all their heads is baldness, every beard is cut off.

Jeremiah 48:18

O thou daughter that dwellest in Dibon, come down from thy glory, and sit in thirst; for the destroyer of Moab is come up against thee, he hath destroyed thy strongholds.

Jeremiah 48:22

and upon Dibon, and upon Nebo, and upon Beth-diblathaim,

Treasury of Scripture Knowledge

Summary

From Aroer, that is upon the bank of the river Arnon, and the city that is in the midst of the river, and all the plain of Medeba unto Dibon;

Bible References

All the plain

Numbers 21:30
We have shot at them; Heshbon is perished even unto Dibon, And we have laid waste even unto Nophah, Which reacheth unto Medeba.
Isaiah 15:2
They are gone up to Bayith, and to Dibon, to the high places, to weep: Moab waileth over Nebo, and over Medeba; on all their heads is baldness, every beard is cut off.
Jeremiah 48:18
O thou daughter that dwellest in Dibon, come down from thy glory, and sit in thirst; for the destroyer of Moab is come up against thee, he hath destroyed thy strongholds.

General references

Numbers 21:31
Thus Israel dwelt in the land of the Amorites.
Numbers 34:14
for the tribe of the children of Reuben according to their fathers houses, and the tribe of the children of Gad according to their fathers houses, have received, and the half-tribe of Manasseh have received, their inheritance:
Joshua 13:16
And their border was from Aroer, that is on the edge of the valley of the Arnon, and the city that is in the middle of the valley, and all the plain by Medeba;
Judges 11:19
And Israel sent messengers unto Sihon king of the Amorites, the king of Heshbon; and Israel said unto him, Let us pass, we pray thee, through thy land unto my place.

American Standard Version Public Domain