1 Chronicles 12:37

From the other side [east] of the Jordan River, of [the tribes of] Reuben and Gad and the half-tribe of Manasseh, 120,000 men, armed with all kinds of weapons of war for the battle.

Numbers 32:33-42

So Moses gave to them, to the sons of Gad and to the sons of Reuben and to the half-tribe of Manasseh the son of Joseph, the kingdom of Sihon, the king of the Amorites and the kingdom of Og, the king of Bashan, the land with its cities and territories, the cities of the surrounding land.

Deuteronomy 3:12-16

“So we took possession of this land at that time. I gave the territory from Aroer, which is by the valley of the Arnon, along with half of the hill country of Gilead and its cities to the Reubenites and to the Gadites.

Joshua 13:7-32

So now, divide this land [west of the Jordan] as an inheritance for the nine tribes and the half-tribe of Manasseh.”

Joshua 14:3

For Moses had given an inheritance to the two tribes and the half-tribe beyond the Jordan; but he did not give [any territory as] an inheritance to the Levites among them.

Joshua 22:1-10

Then Joshua called the Reubenites and the Gadites and the half-tribe of Manasseh,

1 Chronicles 5:1-10

Now [we come to] the sons of Reuben the firstborn of Israel—for Reuben was the eldest, but because he defiled his father’s bed [with Bilhah his father’s concubine], his birthright was given to [Manasseh and Ephraim] the sons of Joseph [the favorite] son of Israel, so that he is not enrolled in the genealogy according to the birthright.

Treasury of Scripture Knowledge

Summary

And on the other side of Jordan, of the Reubenites, and the Gadites, and of the half tribe of Manasseh, with all manner of instruments of war for the battle, an hundred and twenty thousand.

Bible References

The other side

1 Chronicles 5:1
Now [we come to] the sons of Reuben the firstborn of Israel—for Reuben was the eldest, but because he defiled his father’s bed [with Bilhah his father’s concubine], his birthright was given to [Manasseh and Ephraim] the sons of Joseph [the favorite] son of Israel, so that he is not enrolled in the genealogy according to the birthright.
Numbers 32:33
So Moses gave to them, to the sons of Gad and to the sons of Reuben and to the half-tribe of Manasseh the son of Joseph, the kingdom of Sihon, the king of the Amorites and the kingdom of Og, the king of Bashan, the land with its cities and territories, the cities of the surrounding land.
Deuteronomy 3:12
“So we took possession of this land at that time. I gave the territory from Aroer, which is by the valley of the Arnon, along with half of the hill country of Gilead and its cities to the Reubenites and to the Gadites.
Joshua 13:7
So now, divide this land [west of the Jordan] as an inheritance for the nine tribes and the half-tribe of Manasseh.”
Joshua 14:3
For Moses had given an inheritance to the two tribes and the half-tribe beyond the Jordan; but he did not give [any territory as] an inheritance to the Levites among them.
Joshua 22:1
Then Joshua called the Reubenites and the Gadites and the half-tribe of Manasseh,