Deuteronomy 3:12

We took possession of this land. I gave the tribes of Reuben and Gad the land north of Aroer near the Arnon Valley and half of the mountain region of Gilead with its cities.

Deuteronomy 2:36

Jehovah helped us capture every town from the Arnon River Gorge north to the boundary of Gilead. This included the town of Aroer on the edge of the gorge and the town in the middle of the gorge.

Numbers 32:32-38

We will enter Canaan as armed troops in Jehovah's presence. The land we will take possession of is here, east of the Jordan.

Deuteronomy 4:48

This land extended from the town of Aroer, on the edge of the Arnon River, north to Mount Sirion, that is, Mount Hermon.

Joshua 12:2-6

Sihon king of the Amorites, who lived in Heshbon, and ruled from Aroer, which is upon the bank of the Arnon River, and from the middle of the river, and from half Gilead, to the Jabbok River, which is the border of the children of Ammon;

Joshua 13:8-28

With whom the Reubenites and the Gadites have received their inheritance, which Moses gave them, beyond Jordan eastward, even as Moses the servant of Jehovah gave them.

2 Kings 10:33

east of the Jordan, as far south as the town of Aroer on the Arnon River. This included the territories of Gilead and Bashan, where the tribes of Gad, Reuben, and East Manasseh lived.

Treasury of Scripture Knowledge

Summary

And this land, which we possessed at that time, from Aroer, which is by the river Arnon, and half mount Gilead, and the cities thereof, gave I unto the Reubenites and to the Gadites.

Bible References

From aroer

Deuteronomy 2:36
Jehovah helped us capture every town from the Arnon River Gorge north to the boundary of Gilead. This included the town of Aroer on the edge of the gorge and the town in the middle of the gorge.
Deuteronomy 4:48
This land extended from the town of Aroer, on the edge of the Arnon River, north to Mount Sirion, that is, Mount Hermon.
Numbers 32:33
So Moses gave the tribes of Gad, Reuben, and half of the tribe of Manasseh, son of Joseph, the kingdoms of King Sihon of the Amorites and King Og of Bashan. It was the whole land with its cities and its surrounding territory.
Joshua 12:2
Sihon king of the Amorites, who lived in Heshbon, and ruled from Aroer, which is upon the bank of the Arnon River, and from the middle of the river, and from half Gilead, to the Jabbok River, which is the border of the children of Ammon;
Joshua 13:8
With whom the Reubenites and the Gadites have received their inheritance, which Moses gave them, beyond Jordan eastward, even as Moses the servant of Jehovah gave them.
2 Kings 10:33
east of the Jordan, as far south as the town of Aroer on the Arnon River. This included the territories of Gilead and Bashan, where the tribes of Gad, Reuben, and East Manasseh lived.

General references

Numbers 34:14
The tribes of Reuben and Gad and the eastern half of Manasseh have received their property, divided according to their families,
Deuteronomy 29:8
We took their land and gave it as an inheritance to the Reubenites, the Gadites, and the half-tribe of the Manassites.
Joshua 13:16
Their coast was from Aroer that is on the bank of the river Arnon, and the city that is in the midst of the river, and all the plain by Medeba,
Psalm 136:21
And gave their land as a heritage, for his loving kindness is everlasting,