Hebrews 4:1; Hebrews 4:6-8

Hebrews 4:1

1 Let us, therefore, fear, lest a promise being left us of entering into his rest, any of you should seem to come short of it.

Hebrews 4:6-8

6 Seeing, therefore, it remains that some must enter therein, and those to whom it was first preached did not enter in because of disobedience;

7 Again, he determines a certain day, saying, Today, by David so long a time afterward; as it is said, Today if ye will hear his voice, harden not your hearts.

8 For if Jesus {Joshua in Heb.} had given them rest, then he would not afterward have spoken of another day.