Joshua 13:8

for the other half received their inheritance with the Reubenites and the Gadites, which Moses gave them of the other side of the Jordan eastward, according as Moses the slave of the LORD gave them;

Joshua 12:6

These did Moses, the slave of the LORD, and the sons of Israel smite; and Moses, the slave of the LORD, gave that land in possession unto the Reubenites and the Gadites and the half tribe of Manasseh.

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 3:12-17

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 4:12

And the sons of Reuben and the sons of Gad and half the tribe of Manasseh passed armed before the sons of Israel, as Moses had said unto them.

Joshua 22:4

And now the LORD your God has given rest unto your brethren, as he promised them; therefore now return and go to your tents and unto the land of your possessions which Moses the slave of the LORD gave you on the other side of 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
And the sons of Reuben and the sons of Gad and half the tribe of Manasseh passed armed before the sons of Israel, as Moses had said unto them.
Joshua 22:4
And now the LORD your God has given rest unto your brethren, as he promised them; therefore now return and go to your tents and unto the land of your possessions which Moses the slave of the LORD gave you on the other side of the Jordan.
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.

General references

Genesis 49:19
Gad, an army shall invade him, but he shall invade at the last.
Numbers 21:31
Thus Israel dwelt in the land of the Amorite.
Numbers 34:14
because the tribe of the sons of Reuben, according to the houses of their fathers, and the tribe of the sons of Gad, according to the houses of their fathers, and half the tribe of Manasseh have received their inheritance.
Judges 11:19
And Israel sent messengers unto Sihon, king of the Amorites, the king of Heshbon; and Israel said unto him, Let us pass, we pray thee, through thy land into my place.