New American Standard Bible (NASB)
Hebrews 3
14 For we have become partakers of Christ, if we hold fast the beginning of our assurance firm until the end,
15 while it is said, "Today if you hear His voice, Do not harden your hearts, as when they provoked Me."
16 For who provoked Him when they had heard? Indeed, did not all those who came out of Egypt led by Moses?
17 And with whom was He angry for forty years? Was it not with those who sinned, whose bodies fell in the wilderness?
18 And to whom did He swear that they would not enter His rest, but to those who were disobedient?
19 So we see that they were not able to enter because of unbelief.
Hebrews 4
1 Therefore, let us fear if, while a promise remains of entering His rest, any one of you may seem to have come short of it.
2 For indeed we have had good news preached to us, just as they also; but the word they heard did not profit them, because it was not united by faith in those who heard.
3 For we who have believed enter that rest, just as He has said, "As I swore in My wrath, They shall not enter My rest," although His works were finished from the foundation of the world.
4 For He has said somewhere concerning the seventh day: "And God rested on the seventh day from all His works";
5 and again in this passage, "They shall not enter My rest."