'Little Faith' in the Bible

But if God so clothes the grass of the field, which today exists, and tomorrow is thrown into the oven, won't he much more clothe you, you of little faith?

And he said to them, "Why are you fearful, O you of little faith?" Then he got up, rebuked the wind and the sea, and there was a great calm.

Immediately Jesus stretched out his hand, took hold of him, and said to him, "You of little faith, why did you doubt?"

But Jesus, becoming aware of this, said, "You of little faith, why are you discussing among yourselves about having no bread?

So he said to them, "Because of your little faith. For truly I tell you, if you have faith as a grain of mustard seed, you will tell this mountain, 'Move from here to there,' and it will move; and nothing will be impossible for you."