'Mustard seed' in the Bible

He delivered them another parable, saying, The kingdom of heaven is like a mustard seed which a man took and sowed in his field,

And Jesus said to them, On account of your unbelief. For I tell you truly, if you have a faith like a mustard seed, you shall say to this mountain, Be removed thence to that place, and it shall be removed; and nothing shall be impossible to you.

It is like a mustard seed, which when sown in the earth is the least of all seeds on the earth;

It is like a mustard seed which a man took and cast into his garden; and it grew and became a great tree, and the birds of heaven lodged in its branches.

And the Lord said, If you had a faith like a mustard seed, you would say to this sycamore tree, Be taken up by the roots and planted in the sea, and it would obey you.