Mark 4:26-29 - The Parable Of The Seed That Grows By Itself
26 And He said, The kingdom of God is as if a man should cast seed into the ground, 27 and sleep, and rise night and day, and the seed should spring up, and increase; he knows not how. 28 For the earth produces fruit of itself, first the blade, then the ear, then the full corn in the ear: 29 but when the fruit is ripe, he immediately puts in the sickle, because the harvest is come.