Matthew 13:31-32 - The Parable Of The Mustard Seed
31 Another parable He put before them. "The Kingdom of the Heavens," He said, "is like a mustard-seed, which a man takes and sows in his ground. 32 It is the smallest of all seeds, and yet when full-grown it is larger than any herb and forms a tree, so that the birds come and build in its branches."
30 Another saying of His was this: "How are we to picture the Kingdom of God? or by what figure of speech shall we represent it? 31 It is like a mustard-seed, which, when sown in the earth, is the smallest of all the seeds in the world; 32 yet when sown it springs up and becomes larger than all the herbs, and throws out great branches, so that the birds build under its shadow."
33 With many such parables He used to speak the Message to them according to their capacity for receiving it. 34 But except in figurative language He spoke nothing to them; while to His own disciples He expounded everything, in private.