Mark 4:30-34

And he said, How shall we liken the kingdom of God? or in what parable shall we set it forth? It is like a grain of mustard seed, which, when it is sown upon the earth, though it be less than all the seeds that are upon the earth, yet when it is sown, groweth up, and becometh greater than all the herbs, and putteth out great branches; so that the birds of the heaven can lodge under the shadow thereof. And with many such parables spake he the word unto them, as they were able to hear it; and without a parable spake he not unto them: but privately to his own disciples he expounded all things.