1 Chronicles 12:37

And of the other side of the Jordan, of those of Reuben and those of Gad and of the half tribe of Manasseh, with all manner of instruments of war for the battle, one hundred and twenty thousand.

Numbers 32:33-42

Thus Moses gave unto the sons of Gad and to the sons of Reuben and unto 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 and borders, even the cities of the country round about.

Deuteronomy 3:12-16

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

Joshua 13:7-32

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

Joshua 14:3

For Moses had given the inheritance of two tribes and half a tribe on the other side of the Jordan, but unto the Levites he gave no inheritance 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 the sons of Reuben, the firstborn of Israel, (for he was the firstborn, but because he defiled his father's bed, his birthright was given unto the sons of Joseph, the son of Israel; and he was not counted as the firstborn.

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 the sons of Reuben, the firstborn of Israel, (for he was the firstborn, but because he defiled his father's bed, his birthright was given unto the sons of Joseph, the son of Israel; and he was not counted as the firstborn.
Numbers 32:33
Thus Moses gave unto the sons of Gad and to the sons of Reuben and unto 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 and borders, even the cities of the country round about.
Deuteronomy 3:12
And this land, which we inherited at that time, from Aroer, which is by the river Arnon, and half of Mount Gilead and the cities thereof, I gave unto the Reubenites and to the Gadites.
Joshua 13:7
Now therefore divide this land for an inheritance unto the nine tribes and the half tribe of Manasseh,
Joshua 14:3
For Moses had given the inheritance of two tribes and half a tribe on the other side of the Jordan, but unto the Levites he gave no inheritance among them.
Joshua 22:1
Then Joshua called the Reubenites and the Gadites and the half tribe of Manasseh