Numbers 32:8

4 which the LORD conquered before the congregation of Israel, are suitable for livestock—and your servants have livestock.”

5 “If we have found favor in your sight,” they said, “let this land be given to your servants as a possession. Do not make us cross the Jordan.”

6 But Moses asked the Gadites and Reubenites, “Shall your brothers go to war while you sit here?

7 Why are you discouraging the Israelites from crossing into the land that the LORD has given them?

8 This is what your fathers did when I sent them from Kadesh-barnea to inspect the land.

9 For when your fathers went up to the Valley of Eshcol and saw the land, they discouraged the Israelites from entering the land that the LORD had given them.

10 So the anger of the LORD was kindled that day, and He swore an oath, saying,

11 ‘Because they did not follow Me wholeheartedly, not one of the men twenty years of age or older who came out of Egypt will see the land that I swore to give Abraham, Isaac, and Jacob—

12 not one except Caleb son of Jephunneh the Kenizzite and Joshua son of Nun—because they did follow the LORD wholeheartedly.’

Read all of Numbers 32