In Matthew 17:19-20, when Jesus calls out his disciples for thinking too little of the power of God within them, he talks about tiny mustard seeds. He tells them that if they had the faith even of a mustard seed, they would be able to tell massive things like mountains to move, and those massive things would move.
The mustard seed becomes an object lesson in faith. We usually hear it used to illustrate that if such a small amount of faith...