Joshua 13:8

With it the Reubenites, and the Gadites received their inheritance, which Moses gave them beyond the Jordan to the east, just as Moses Yahweh's servant gave to them:

Joshua 12:6

Moses Yahweh's servant and the {Israelites} defeated them; and Moses Yahweh's servant gave it [as] a possession to the Reubenites, the Gadites, and the half-tribe of Manasseh.

Numbers 32:33-42

So Moses gave to them, to the descendants of Gad and the descendants of Reuben, and to half of the tribe of Joseph's son Manasseh, the kingdom of Sihon the king of Amorites and the kingdom of Og the king of the Bashan, the land with its cities [and their] territories, the cities of the surrounding land.

Deuteronomy 3:12-17

And [so] we took possession of this land at that time, from Aroer, which [is] on the [edge of the] wadi of Arnon, and [also] half of the hill country of Gilead and its towns I gave to the Reubenites and to the Gadites.

Joshua 4:12

The children of Reuben, Gad, and the half-tribe of Manasseh crossed [over] armed before the {Israelites}, as Moses told them.

Joshua 22:4

So then, Yahweh your God has given rest to your kinsmen, just as he promised them; so then, turn and go to your tents to the land of your possession, which Moses Yahweh's servant gave to 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 children of Reuben, Gad, and the half-tribe of Manasseh crossed [over] armed before the {Israelites}, as Moses told them.
Joshua 22:4
So then, Yahweh your God has given rest to your kinsmen, just as he promised them; so then, turn and go to your tents to the land of your possession, which Moses Yahweh's servant gave to you beyond the Jordan.
Numbers 32:33
So Moses gave to them, to the descendants of Gad and the descendants of Reuben, and to half of the tribe of Joseph's son Manasseh, the kingdom of Sihon the king of Amorites and the kingdom of Og the king of the Bashan, the land with its cities [and their] territories, the cities of the surrounding land.
Deuteronomy 3:12
And [so] we took possession of this land at that time, from Aroer, which [is] on the [edge of the] wadi of Arnon, and [also] half of the hill country of Gilead and its towns I gave to the Reubenites and to the Gadites.

General references

Genesis 49:19
Bandits shall attack Gad, but he shall attack [their] heels.
Numbers 21:31
Thus Israel lived in the land of the Amorites.
Numbers 34:14
For the tribe of the children of the Reubenites, the children of the Gadites, and the half-tribe of Manasseh took their inheritance according to the house of their families.
Judges 11:19
Israel sent messengers to Sihon king of the Amorites, king of Heshbon; and Israel said to him, 'Please let us cross through your land {to our country}.'