'Doubt' in the Bible

And they were all amazed, and were in doubt, saying one to another, What meaneth this?

"Therefore, let all the people of Israel understand beyond a doubt that God made this Jesus, whom you crucified, both Lord and Messiah!"

So he came to Jerusalem and made several attempts to associate with the disciples, but they were all afraid of him, being in doubt as to whether he himself was a disciple.

Now while Peter was in doubt as to the purpose of this vision, the men who were sent by Cornelius, having made search for Simon's house, came to the door,

Get up, go downstairs and go with them without hesitating or doubting, because I have sent them Myself.”

Because we have knowledge that some who went from us have been troubling you with their words, putting your souls in doubt; to whom we gave no such order;

What then should we do? They will no doubt hear that you have come.

And when the barbarians saw the venomous beast hang on his hand, they said among themselves, No doubt this man is a murderer, whom, though he hath escaped the sea, yet vengeance suffereth not to live.