Mark 4:30-32 New International Version (NIV)
The Parable of the Mustard Seed
30 Again he said, “What shall we say the kingdom of God is like, or what parable shall we use to describe it? 31 It is like a mustard seed, which is the smallest of all seeds on earth. 32 Yet when planted, it grows and becomes the largest of all garden plants, with such big branches that the birds can perch in its shade.”