Mark 4:26-29

26And He was saying, “The kingdom of God is like a man who casts seed upon the soil; 27and he goes to bed at night and gets up daily, and the seed sprouts and grows--how, he himself does not know. 28The soil produces crops by itself; first the stalk, then the head, then the mature grain in the head. 29Now when the crop permits, he immediately 12puts in the sickle, because the harvest has come.”