Numbers 32:19

For we will not take possession with them from across the Jordan and beyond because our inheritance has come to us from across the Jordan to the east."

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:

Genesis 13:10-12

And Lot lifted up his eyes and saw the whole plain of the Jordan, that all of it [was] well-watered land--[this was] before Yahweh destroyed Sodom and Gomorrah--like the garden of Yahweh, like the land of Egypt {in the direction of} Zoar.

Genesis 14:12

And they took Lot, the son of the brother of Abram, and his possessions, and left. (Now he had been living in Sodom.)

Numbers 32:32-33

We ourselves will cross over armed {before} Yahweh to the land of Canaan, and the property of our inheritance [will remain] with us beyond the Jordan."

Numbers 34:15

The two and a half tribes have taken their inheritance from beyond the Jordan [across] Jericho, east toward the sunrise."

Joshua 1:14-15

Your wives, your little children, and your livestock, they will remain in the land that Moses gave to you beyond the Jordan. {All of the best fighting men} will cross armed in front of your families; they will help you

Joshua 12:1-6

These [are] the kings of the land whom the {Israelites} defeated, and of whose land they took possession beyond the Jordon {to the east}, from the wadi of Arnon up to Mount Hermon, and all the Arabah to the east:

2 Kings 10:32-33

In those days, Yahweh began to reduce Israel, so Hazael defeated them in every territory of Israel,

2 Kings 15:29

In the days of Pekah king of Israel, Tiglath-Pileser the king of Assyria came and took Ijon, Abel-Beth-Maacah, Janoah, Kedesh, Hazor, the Gilead, the Galilee, and all the land of Naphtali; then he deported them to Assyria.

1 Chronicles 5:25-26

But they transgressed against the God of their ancestors and prostituted themselves after the gods of the peoples of the land, whom God had destroyed before them.

Proverbs 20:21

An inheritance acquired [hastily] {at the beginning} will not be blessed at its end.

Treasury of Scripture Knowledge

Summary

For we will not inherit with them on yonder side Jordan, or forward; because our inheritance is fallen to us on this side Jordan eastward.

Bible References

We will

Genesis 13:10
And Lot lifted up his eyes and saw the whole plain of the Jordan, that all of it [was] well-watered land--[this was] before Yahweh destroyed Sodom and Gomorrah--like the garden of Yahweh, like the land of Egypt {in the direction of} Zoar.
Genesis 14:12
And they took Lot, the son of the brother of Abram, and his possessions, and left. (Now he had been living in Sodom.)
2 Kings 10:32
In those days, Yahweh began to reduce Israel, so Hazael defeated them in every territory of Israel,
2 Kings 15:29
In the days of Pekah king of Israel, Tiglath-Pileser the king of Assyria came and took Ijon, Abel-Beth-Maacah, Janoah, Kedesh, Hazor, the Gilead, the Galilee, and all the land of Naphtali; then he deported them to Assyria.
1 Chronicles 5:25
But they transgressed against the God of their ancestors and prostituted themselves after the gods of the peoples of the land, whom God had destroyed before them.
Proverbs 20:21
An inheritance acquired [hastily] {at the beginning} will not be blessed at its end.

Because

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.
Joshua 12:1
These [are] the kings of the land whom the {Israelites} defeated, and of whose land they took possession beyond the Jordon {to the east}, from the wadi of Arnon up to Mount Hermon, and all the Arabah to the east:
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: