'Mustard seed' in the Bible

Another figure which he used in speaking to them was this: "The Kingdom of Heaven is like a mustard seed which a man took and sowed in his field.

It is like a mustard seed, which, when sown in the ground, though it is the smallest of all the seeds in the world,

It is like a mustard seed that a man took and dropped in his garden, and it grew and became a tree, and the wild birds roosted on its branches."

And the Master said, "If your faith is as big as a mustard seed, you might have said to this mulberry tree, 'Be pulled up by the roots and planted in the sea,' and it would have obeyed you!