Hebrews 3:16-19
3:16 For which ones heard and rebelled? Was it not all who came out of Egypt under Moses’ leadership?
3:17 And against whom was God provoked for forty years? Was it not those who sinned, whose dead bodies fell in the wilderness?
3:18 And to whom did he swear they would never enter into his rest, except those who were disobedient?
3:19 So we see that they could not enter because of unbelief.