Hebrews 3:16-19

The same people who were delivered from bondage and brought out of Egypt by Moses, were the ones who heard and still rebelled. They grieved God for forty years by sinning in their unbelief, until they dropped dead in the desert. So God swore an oath that they would never enter into his calming place of rest all because they disobeyed him. It is clear that they could not enter into their inheritance because they wrapped their hearts in unbelief.