Hebrews 3:10-11, 17-19

So I was angry with them, and I said, ‘Their hearts always turn away from me. They refuse to do what I tell them.’ So in my anger I took an oath: ‘They will never enter my place of rest.’”

And who made God angry for forty years? Wasn’t it the people who sinned, whose corpses lay in the wilderness? And to whom was God speaking when he took an oath that they would never enter his rest? Wasn’t it the people who disobeyed him? So we see that because of their unbelief they were not able to enter his rest.