Luke 17:5-6

5. The apostles said to the Lord, "Increase our faith!"
6. He replied, "If you have faith as small as a mustard seed, you can say to this mulberry tree, `Be uprooted and planted in the sea,' and it will obey you.

Luke 13:18-19

18. Then Jesus asked, "What is the kingdom of God like? What shall I compare it to?
19. It is like a mustard seed, which a man took and planted in his garden. It grew and became a tree, and the birds of the air perched in its branches."