Matthew 17:17
Jesus answered, "O you unbelieving, obstinate people! How long must I be with you? How long must I put up with you? Bring him here to me!"
Matthew 17:20
He said to them, "Because you have so little faith. For I tell you, if you have faith the size of a grain of mustard, you can say to this mountain, 'Move from here over to there!' and it will move, and nothing will be impossible for you."
Luke 1:20
Now you will keep silent and be unable to speak until the day when this happens, because you have not believed what I have said, for it will all be fulfilled in due time."
Luke 1:45
Blessed is she who has believed, For what the Lord has promised her will be fulfilled!"
Romans 4:20
He did not incredulously question God's promise, but his faith gave him power and he praised God
1 Peter 3:15
but reverence Christ in your hearts as Lord, and always be ready to make your defense to anyone who calls you to account for the hope that you have. But do so gently and respectfully,