Mark 4:26-34
And He was saying, “The kingdom of God is like a man who casts seed upon the soil; and he sleeps and rises, night and day, and the seed sprouts and grows—how, he himself does not know. “The soil produces crops by itself; first the blade, then the head, then the mature grain in the head. “But when the grain is ripe, he immediately aputs in the sickle, because the harvest has come.” And He was saying, “How shall we compare 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 smallest of all the seeds that are upon the soil, yet when it is sown, it grows up and becomes largest of all the garden plants and forms large branches; so that THE BIRDS OF THE AIR can NEST UNDER ITS SHADE.” And with many such parables He was speaking the word to them, as they were able to hear it; and He was not speaking to them without a parable; but He was explaining everything privately to His own disciples.