Numbers 32:6-13

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

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

8That’s what your ancestors did when I sent them from Kadesh-barnea to see the land.

9After they went up as far as Eshcol Valley and saw the land, they discouraged the Israelites from entering the land the Lord had given them.

10So the Lord’s anger burned that day, and he swore an oath:

11‘Because they did not remain loyal to me, none of the men twenty years old or more who came up from Egypt will see the land I swore to give Abraham, Isaac, and Jacob  —

12none except Caleb son of Jephunneh the Kenizzite and Joshua son of Nun, because they did remain loyal to the Lord.’

13The Lord’s anger burned against Israel, and he made them wander in the wilderness forty years until the whole generation that had done what was evil in the Lord’s sight was gone.