'Unbelief' in the Bible

And he did not there many works of power, because of their unbelief.

And he says to them, Because of your unbelief; for verily I say unto you, If ye have faith as a grain of mustard seed, ye shall say to this mountain, Be transported hence there, and it shall transport itself; and nothing shall be impossible to you.

And he wondered because of their unbelief. And he went round the villages in a circuit, teaching.

And immediately the father of the young child crying out said with tears, I believe, help mine unbelief.

Afterwards as they lay at table he was manifested to the eleven, and reproached them with their unbelief and hardness of heart, because they had not believed those who had seen him risen.

For what? if some have not believed, shall their unbelief make the faith of God of none effect?

and hesitated not at the promise of God through unbelief; but found strength in faith, giving glory to God;

Right: they have been broken out through unbelief, and thou standest through faith. Be not high-minded, but fear:

And they too, if they abide not in unbelief, shall be grafted in; for God is able again to graft them in.

For as indeed ye also once have not believed in God, but now have been objects of mercy through the unbelief of these;

For God hath shut up together all in unbelief, in order that he might shew mercy to all.

who before was a blasphemer and persecutor, and an insolent overbearing man: but mercy was shewn me because I did it ignorantly, in unbelief.

See, brethren, lest there be in any one of you a wicked heart of unbelief, in turning away from the living God.

And we see that they could not enter in on account of unbelief;)