1 Chronicles 12:37

And on the other side of Jordan, from the Reubenites, and of the Gadites, and from the half tribe of Manasseh, with all of the weapons of war for battle were a hundred and twenty thousand.

Numbers 32:33-42

And Moses gave to them, to the sons of Gad and to the sons of Reuben, and to the half the tribe of Manasseh the son of Joseph, the kingdom of Sihon king of the Amorites, and the kingdom of Og king of Bashan, the land with its cities in the borders, the cities of the land all around.

Deuteronomy 3:12-16

And this is the land which we possessed at that time, from Aroer by the river Arnon, and half of Mount Gilead, and its cities, I gave to the men of Reuben and of Gad.

Joshua 13:7-32

And, therefore, divide this land for an inheritance to the nine tribes and the half tribe of Manasseh,

Joshua 14:3

For Moses had given the inheritance of two tribes and a half tribe on the other side Jordan. But to the Levites he gave no inheritance among them.

Joshua 22:1-10

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

1 Chronicles 5:1-10

And the sons of Reuben, the first-born of Israel (for he was the first-born; but since he defiled his father's bed, his birthright was given to the sons of Joseph the son of Israel, and the genealogy is not to be counted 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
And the sons of Reuben, the first-born of Israel (for he was the first-born; but since he defiled his father's bed, his birthright was given to the sons of Joseph the son of Israel, and the genealogy is not to be counted according to the birthright;
Numbers 32:33
And Moses gave to them, to the sons of Gad and to the sons of Reuben, and to the half the tribe of Manasseh the son of Joseph, the kingdom of Sihon king of the Amorites, and the kingdom of Og king of Bashan, the land with its cities in the borders, the cities of the land all around.
Deuteronomy 3:12
And this is the land which we possessed at that time, from Aroer by the river Arnon, and half of Mount Gilead, and its cities, I gave to the men of Reuben and of Gad.
Joshua 13:7
And, therefore, divide this land for an inheritance to the nine tribes and the half tribe of Manasseh,
Joshua 14:3
For Moses had given the inheritance of two tribes and a half tribe on the other side Jordan. But to the Levites he gave no inheritance among them.
Joshua 22:1
Then Joshua called for the Reubenites and the Gadites, and the half tribe of Manasseh,