http://www.fathershands.com/mustardseed/
"The kingdom of heaven is like a mustard seed, which a man took and
planted in his field. Though it is the smallest of all your seeds,
yet when it grows, it is the largest of garden plants and becomes a
tree, so that the birds of the air come and perch in its
branches."
Matthew 13:31
Because you have so little faith. I tell you the truth, if you have
faith like a mustard seed, you can move mountains."
Matthew 17:20