Matthew 13:31-32 - The Parable Of The Mustard Seed
31 He told them this story, as follows: "The kingdom of heaven may be compared to a mustard seed which a man took and sowed in his field. 32 It is the smallest of all seeds, but when it is grown it is the largest of plants; yea, it grows into a tree, so that the wild birds come and roost in its branches."
30 Then He kept on saying: "How can I further picture the kingdom of God, or by what story can I illustrate it? 31 It is like a mustard seed, which, when it is sown in the ground, is the smallest of all seeds, 32 but when it is properly sown, it comes up and grows to be the largest of all the plants, and produces branches so large that the wild birds can roost under its shade."
33 With many stories like these He kept on telling them the message, as far as they could understand it. 34 He did not tell them anything except by stories, but to His own disciples He kept on privately explaining everything.