Strong G543 ἀπείθεια apeitheia · disobedience

Hebrews

1. Hebrews 4:6
   Seeing therefore it remaineth that some must enter therein, and they to whom it was first preached entered not in because of unbelief:
2. Hebrews 4:11
   Let us labour therefore to enter into that rest, lest any man fall after the same example of unbelief.