Numbers 32:12

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.’

13 The anger of the LORD burned against Israel, and He made them wander in the wilderness forty years, until the whole generation who had done evil in His sight was gone.

14 Now behold, you, a brood of sinners, have risen up in place of your fathers to further stoke the burning anger of the LORD against Israel.

15 For if you turn away from following Him, He will once again leave this people in the wilderness, and you will be the cause of their destruction.”

16 Then the Gadites and Reubenites approached Moses and said, “We want to build sheepfolds here for our livestock and cities for our little ones.

Read all of Numbers 32