Hebrews 3:18
And to whom did God vow that they would not enter a state of rest with Him? [Was it not] those who were disobedient to Him?
Hebrews 3:11
So I vowed in my anger, 'They will not enter a state of rest with me.'"
Hebrews 4:2
For we [Christians] have had the good news [about resting with God] preached to us, just as the Israelites [had good news proclaimed to them. See 1:16-19]. But the message they heard did not benefit them, because it was not coupled with faith by those who heard it.
Hebrews 4:6
So, since it still remains for some people to enter into that rest, but those to whom the good news was previously proclaimed [See verse 2] failed to enter it because of disobedience [See 3:18]