Mark 4:30-34

And He said, “How shall we picture the kingdom of God, or by what parable shall we present it? It is like a mustard seed, which, when sown upon the soil, though it is smaller than all the seeds that are upon the soil, yet when it is sown, it grows up and becomes larger than all the garden plants and forms large branches; so that THE BIRDS OF THE AIR can NEST UNDER ITS SHADE.” With many such parables He was speaking the word to them, so far as they were able to hear it; and He did not speak to them without a parable; but He was explaining everything privately to His own disciples.