Hebrews 3:7-10, 16-19

Therefore, as the Holy Spirit says: “Today, if you will hear His voice, Do not harden your hearts as in the rebellion, In the day of trial in the wilderness, Where your fathers tested Me, tried Me, And saw My works forty years. Therefore I was angry with that generation, And said, ‘They always go astray in their heart, And they have not known My ways.’

For who, having heard, rebelled? Indeed, was it not all who came out of Egypt, led by Moses? Now with whom was He angry forty years? Was it not with those who sinned, whose corpses fell in the wilderness? And to whom did He swear that they would not enter His rest, but to those who did not obey? So we see that they could not enter in because of unbelief.