'Little Faith' in the Bible

Now: if God so clothe the grass of the field, which to day is, and to morrow is cast into the still, will he not much more clothe you, O ye of little faith?

And he saith to them, Why are ye fearful, O ye of little faith? Then arising, he rebuked the winds and the sea, and there was a great calm.

And immediately Jesus reaching forth his hand, caught him, and saith to him, O thou of little faith, wherefore didst thou doubt?

Jesus knowing it said to them, O ye of little faith, why reason ye among yourselves, because ye have taken no bread?