Matthew 13:31-32 - The Parable Of The Mustard Seed
31 Another parable which he told them was this-- "The Kingdom of Heaven is like a mustard-seed, which a man took and sowed in his field. 32 This seed is smaller than all other seeds, but, when it has grown up, it is larger than the herbs and becomes a tree, so that 'the wild birds come and roost in its branches.'"
30 Jesus also said: "To what can we liken the Kingdom of God? 31 By what can we illustrate it? Perhaps by the growth of a mustard-seed. This seed, when sown in the ground, though it is smaller than all other seeds, 32 Yet, when sown, shoots up, and becomes larger than any other herb, and puts out great branches, so that even 'the wild birds can roost in its shelter.'"
33 With many such parables Jesus used to speak to the people of his Message, as far as they were able to receive it; 34 And to them he never used to speak except in parables; but in private to his own disciples he explained everything.