Numbers 32:19

For we will not inherit with them on yonder side the Jordan, and further, because our inheritance is fallen to us on this side the Jordan eastward.

Joshua 13:8

with him the Reubenites and the Gadites have received their inheritance, which Moses gave them, beyond the Jordan eastward, as Moses the servant of Jehovah gave them:

Genesis 13:10-12

And Lot lifted up his eyes, and beheld all the plain of the Jordan that it was thoroughly watered, before Jehovah had destroyed Sodom and Gomorrah; as the garden of Jehovah, like the land of Egypt, as one goes to Zoar.

Genesis 14:12

And they took Lot and his property, Abram's brother's son, and departed. For he dwelt in Sodom.

Numbers 32:32-33

We will pass over armed before Jehovah into the land of Canaan, and the possession of our inheritance on this side the Jordan shall be ours.

Numbers 34:15

the two tribes and the half tribe have received their inheritance on this side the Jordan of Jericho eastward, toward the sun-rising.

Joshua 1:14-15

Your wives, your little ones, and your cattle shall abide in the land that Moses gave you on this side of the Jordan, but ye, all the valiant men, shall go over in array before your brethren and help them,

Joshua 12:1-6

And these are the kings of the land, whom the children of Israel smote, and of whose land they took possession across the Jordan, toward the sun-rising, from the river Arnon to mount Hermon, and all the plain on the east:

2 Kings 10:32-33

In those days Jehovah began to cut Israel short; and Hazael smote them in all the borders of Israel;

2 Kings 15:29

In the days of Pekah king of Israel, Tiglath-Pileser king of Assyria came and took Ijon, and Abel-Beth-Maachah, and Janoah, and Kedesh, and Hazor, and Gilead, and Galilee, all the land of Naphtali, and carried them captive to Assyria.

1 Chronicles 5:25-26

And they transgressed against the God of their fathers, and went a whoring after the gods of the peoples of the land, whom God had destroyed before them.

Proverbs 20:21

An inheritance obtained hastily at the beginning will not be blessed in the 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 beheld all the plain of the Jordan that it was thoroughly watered, before Jehovah had destroyed Sodom and Gomorrah; as the garden of Jehovah, like the land of Egypt, as one goes to Zoar.
Genesis 14:12
And they took Lot and his property, Abram's brother's son, and departed. For he dwelt in Sodom.
2 Kings 10:32
In those days Jehovah began to cut Israel short; and Hazael smote them in all the borders of Israel;
2 Kings 15:29
In the days of Pekah king of Israel, Tiglath-Pileser king of Assyria came and took Ijon, and Abel-Beth-Maachah, and Janoah, and Kedesh, and Hazor, and Gilead, and Galilee, all the land of Naphtali, and carried them captive to Assyria.
1 Chronicles 5:25
And they transgressed against the God of their fathers, and went a whoring after the gods of the peoples of the land, whom God had destroyed before them.
Proverbs 20:21
An inheritance obtained hastily at the beginning will not be blessed in the end.

Because

Numbers 32:33
And Moses gave to them, to the children of Gad, and to the children of Reuben, and to half the tribe of Manasseh the son of Joseph, the kingdom of Sihon king of the Amorites, and the kingdom of Og the king of Bashan, the land, according to its cities and territories, the cities of the land round about.
Joshua 12:1
And these are the kings of the land, whom the children of Israel smote, and of whose land they took possession across the Jordan, toward the sun-rising, from the river Arnon to mount Hermon, and all the plain on the east:
Joshua 13:8
with him the Reubenites and the Gadites have received their inheritance, which Moses gave them, beyond the Jordan eastward, as Moses the servant of Jehovah gave them: