Numbers 32:10-13 That day Jehovah became angry and swore this oath:

NSB⁽ⁱ⁾ ¹⁰ That day Jehovah became angry and swore this oath: ¹¹ »None of the people twenty years old or older, who came from Egypt, will see the land I promised Abraham, Isaac, and Jacob with an oath. This is because they did not wholeheartedly follow me. ¹² »Only Caleb son of Jephunneh the Kenizzite and Joshua son of Nun will get to see the land. This is because they wholeheartedly followed Jehovah. ¹³ »Jehovah’s anger blazed against the Israelites. Therefore he made them wander in the desert for forty years until the whole generation of those who had done evil in Jehovah’s presence was gone.