Matt.13.58  And he did not do many mighty works there, because of their unbelief.
Mark.6.6  And he marveled because of their unbelief. And he went about among the villages teaching.
Mark.9.24  Immediately the father of the child cried out and said, "I believe; help my unbelief!"
Mark.16.14  Afterward he appeared to the eleven themselves as they sat at table; and he upbraided them for their unbelief and hardness of heart, because they had not believed those who saw him after he had risen.
Rom.11.20  That is true. They were broken off because of their unbelief, but you stand fast only through faith. So do not become proud, but stand in awe.
Rom.11.23  And even the others, if they do not persist in their unbelief, will be grafted in, for God has the power to graft them in again.
1Tim.1.13  though I formerly blasphemed and persecuted and insulted him; but I received mercy because I had acted ignorantly in unbelief,
Heb.3.19  So we see that they were unable to enter because of unbelief.