Deuteronomy 3:16

I assigned the territory from Gilead to the Arnon River to the tribes of Reuben and Gad. The middle of the river was their southern boundary, and their northern boundary was the Jabbok River, part of which formed the Ammonite border.

Numbers 21:24

Israel defeated them in battle and took possession of their land from the Arnon Valley to the Jabbok River. They stopped at the border of the Ammon because it was fortified.

Deuteronomy 2:37

However, we did not go near the Ammonite towns, both in the mountains and near the Jabbok River, just as Jehovah commanded.

2 Samuel 24:5

They crossed the Jordan and camped south of Aroer, the city in the middle of the valley, in the territory of Gad. Then they went north to Jazer.

Genesis 32:22

That same night Jacob got up, took his two wives, his two concubines, and his eleven children, and crossed the ford of the Jabbok River.

Numbers 32:33-38

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 12:2-3

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;

Treasury of Scripture Knowledge

Summary

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

Bible References

Reubenites

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.
2 Samuel 24:5
They crossed the Jordan and camped south of Aroer, the city in the middle of the valley, in the territory of Gad. Then they went north to Jazer.

River jabbok

Deuteronomy 2:37
However, we did not go near the Ammonite towns, both in the mountains and near the Jabbok River, just as Jehovah commanded.
Genesis 32:22
That same night Jacob got up, took his two wives, his two concubines, and his eleven children, and crossed the ford of the Jabbok River.
Numbers 21:24
Israel defeated them in battle and took possession of their land from the Arnon Valley to the Jabbok River. They stopped at the border of the Ammon because it was fortified.
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;

General references

Numbers 21:31
After the Israelites settled in the Amorite territory,
Numbers 34:14
The tribes of Reuben and Gad and the eastern half of Manasseh have received their property, divided according to their families,
Psalm 136:21
And gave their land as a heritage, for his loving kindness is everlasting,