'Mustard seed' in the Bible

He set another parable before them, saying, "The Kingdom of Heaven is like a grain of mustard seed, which a man took, and sowed in his field;

So he said to them, "Because of your little faith. For truly I tell you, if you have faith as a grain of mustard seed, you will tell this mountain, 'Move from here to there,' and it will move; and nothing will be impossible for you."

It's like a grain of mustard seed, which, when it is sown in the earth, though it is less than all the seeds that are on the earth,

It is like a grain of mustard seed, which a man took, and put in his own garden. It grew, and became a tree, and the birds of the sky lodged in its branches."

The Lord said, "If you had faith like a grain of mustard seed, you would tell this sycamore tree, 'Be uprooted, and be planted in the sea,' and it would obey you.