Numbers 32:6-13

6Moses replied to the sons of Gad and Reuben, “Should your countrymen go to war while you dwell here?

7Why do you dishearten Bnei-Yisrael from going across to the land that Adonai has given to them?

8Your fathers did this when I sent them from Kadesh Barnea to look over the land.

9They went up to the Valley of Eshcol and viewed the land, but they discouraged the hearts of Bnei-Yisrael not to enter the land which Adonai had given them.

10The anger of Adonai was aroused that day, and He swore an oath saying:

11‘The men who came out of Egypt, from 20 years old and upward, will not see the land I promised to Abraham, Isaac and Jacob, for they have not followed after Me with a whole heart—

12except Caleb son of Jephunneh the Kenizzite and Joshua son of Nun, for they were wholehearted after Adonai.’

13The anger of Adonai burned against Israel and He caused them to wander in the wilderness 40 years until all the generation doing that evil in Adonai’s sight was gone.