Hebrews 4:6

4:6 Therefore it remains for some to enter it, yet those to whom it was previously proclaimed did not enter because of disobedience.

Hebrews 5:11

The Need to Move on to Maturity

5:11 On this topic we have much to say and it is difficult to explain, since you have become sluggish in hearing.

Hebrews 6:13

6:13 Now when God made his promise to Abraham, since he could swear by no one greater, he swore by himself,

Hebrews 10:2

10:2 For otherwise would they not have ceased to be offered, since the worshipers would have been purified once for all and so have no further consciousness of sin?