The Parable of the Mustard Seed
Mark 4:30-32

30 Then He said, “To what shall we liken the kingdom of God? Or with what parable shall we picture it? 31 It is like a mustard seed which, when it is sown on the ground, is smaller than all the seeds on earth; 32 but when it is sown, it grows up and becomes greater than all herbs, and shoots out large branches, so that the birds of the air may nest under its shade.”