'Little Faith' in the Bible

But if God so clothed the verdure of the field, existing today and tomorrow cast into the oven, how much more you, O ye of little faith?

And He says to them, Why are you afraid, O ye of little faith? Then having arisen, He rebuked the wind and the sea; and there was a great calm.

And Jesus immediately reaching out His hand, received him, and says to him, O thou of little faith, wherefore didst thou doubt?

And Jesus knowing said to them, Why do you reason among yourselves, O ye of little faith, because you did not take bread?