ἀπιστία

Matthew 13:58 ἀπιστίαν unbelief

And He did not do many miracles there, because of their unbelief.

Mark 6:6 ἀπιστίαν unbelief

And He was amazed at their unbelief. And He went around from village to village, teaching the people.

Mark 9:24 ἀπιστίᾳ.¶ unbelief!

Immediately the boy’s father cried out, “I do believe; help my unbelief!”

Romans 3:3 ἀπιστία unbelief

What if some did not have faith? Will their lack of faith nullify God’s faithfulness?

Romans 4:20 ἀπιστίᾳ, through unbelief,

Yet he did not waver through disbelief in the promise of God, but was strengthened in his faith and gave glory to God,

Romans 11:20 ἀπιστίᾳ unbelief

That is correct: They were broken off because of unbelief, but you stand by faith. Do not be arrogant, but be afraid.

Romans 11:23 ἀπιστίᾳ, in unbelief,

And if they do not persist in unbelief, they will be grafted in, for God is able to graft them in again.

1 Timothy 1:13 ἀπιστίᾳ· unbelief;

I was formerly a blasphemer, a persecutor, and a violent man; yet because I had acted in ignorance and unbelief, I was shown mercy.

Hebrews 3:12 ἀπιστίας of unbelief

See to it, brothers, that none of you has a wicked heart of unbelief that turns away from the living God.

Hebrews 3:19 ἀπιστίαν.¶ unbelief.

So we see that it was because of their unbelief that they were unable to enter.