1 Chronicles 12:37

From the other side of Jordan, there were a hundred and twenty thousand of the Reubenites and the Gadites and the men of the half-tribe of Manasseh, armed with every sort of instrument of war.

Numbers 32:33-42

So Moses gave to them, even to the children of Gad and the children of Reuben and to the half-tribe of Manasseh, the son of Joseph, the kingdom of Sihon, king of the Amorites and Og, king of Bashan, all the land with its towns and the country round them.

Deuteronomy 3:12-16

And this land which we took at that time, from Aroer by the valley of the Arnon, and half the hill-country of Gilead with its towns, I gave to the Reubenites and the Gadites.

Joshua 13:7-32

So now make division of this land for a heritage to the nine tribes, and the half-tribe of Manasseh.

Joshua 14:3

For Moses had given their heritage to the two tribes and the half-tribe on the other side of Jordan, but to the Levites he gave no heritage among them.

Joshua 22:1-10

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

1 Chronicles 5:1-10

And the sons of Reuben, the oldest son of Israel, (for he was the oldest son, but, because he made his father's bride-bed unclean, his birthright was given to the sons of Joseph, the son of Israel; but he is not to be given the place of the oldest.

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 oldest son of Israel, (for he was the oldest son, but, because he made his father's bride-bed unclean, his birthright was given to the sons of Joseph, the son of Israel; but he is not to be given the place of the oldest.
Numbers 32:33
So Moses gave to them, even to the children of Gad and the children of Reuben and to the half-tribe of Manasseh, the son of Joseph, the kingdom of Sihon, king of the Amorites and Og, king of Bashan, all the land with its towns and the country round them.
Deuteronomy 3:12
And this land which we took at that time, from Aroer by the valley of the Arnon, and half the hill-country of Gilead with its towns, I gave to the Reubenites and the Gadites.
Joshua 13:7
So now make division of this land for a heritage to the nine tribes, and the half-tribe of Manasseh.
Joshua 14:3
For Moses had given their heritage to the two tribes and the half-tribe on the other side of Jordan, but to the Levites he gave no heritage among them.
Joshua 22:1
Then Joshua sent for the Reubenites and the Gadites and the half-tribe of Manasseh,

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain