Joshua 13:8

With the other half-tribe, the Reubenites and the Gadites received their inheritance which Moses gave them beyond the Jordan to the east, just as Moses the servant of the Lord gave to them;

Joshua 12:6

Moses the servant of the Lord and the sons of Israel defeated them; and Moses the servant of the Lord gave it to the Reubenites and the Gadites and the half-tribe of Manasseh as a possession.

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 Joseph’s son Manasseh, the kingdom of Sihon, king of the Amorites and the kingdom of Og, the king of Bashan, the land with its cities with their territories, the cities of the surrounding land.

Deuteronomy 3:12-17

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

Joshua 4:12

The sons of Reuben and the sons of Gad and the half-tribe of Manasseh crossed over in battle array before the sons of Israel, just as Moses had spoken to them;

Joshua 22:4

And now the Lord your God has given rest to your brothers, as He spoke to them; therefore turn now and go to your tents, to the land of your possession, which Moses the servant of the Lord gave you beyond the Jordan.

Treasury of Scripture Knowledge

Summary

With whom the Reubenites and the Gadites have received their inheritance, which Moses gave them, beyond Jordan eastward, even as Moses the servant of the LORD gave them;

Bible References

Moses gave

Joshua 4:12
The sons of Reuben and the sons of Gad and the half-tribe of Manasseh crossed over in battle array before the sons of Israel, just as Moses had spoken to them;
Joshua 22:4
And now the Lord your God has given rest to your brothers, as He spoke to them; therefore turn now and go to your tents, to the land of your possession, which Moses the servant of the Lord gave you beyond the Jordan.
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 Joseph’s son Manasseh, the kingdom of Sihon, king of the Amorites and the kingdom of Og, the king of Bashan, the land with its cities with their territories, the cities of the surrounding land.
Deuteronomy 3:12
“So we took possession of this land at that time. From Aroer, which is by the valley of Arnon, and half the hill country of Gilead and its cities I gave to the Reubenites and to the Gadites.

General references

Genesis 49:19
As for Gad, raiders shall raid him,
But he will raid at their heels.
Numbers 21:31
Thus Israel lived in the land of the Amorites.
Numbers 34:14
For the tribe of the sons of Reuben have received theirs according to their fathers’ households, and the tribe of the sons of Gad according to their fathers’ households, and the half-tribe of Manasseh have received their possession.
Judges 11:19
And Israel sent messengers to Sihon king of the Amorites, the king of Heshbon, and Israel said to him, “Please let us pass through your land to our place.”