Hebrews 3:17

For we have become partakers of Christ, if we hold the beginning of our confidence firm to the end,

while it is said,

“Today if you will hear his voice,

don’t harden your hearts, as in the rebellion.”

For who, when they heard, rebelled? Wasn’t it all those who came out of Egypt led by Moses?

To whom did he swear that they wouldn’t enter into his rest, but to those who were disobedient?

We see that they weren’t able to enter in because of unbelief.