The “land was at rest” as long as sin was at rest. But the land is said to be disturbed, meaning those who inhabit the land, when the souls of the people began to move and to dislocate in sin. This is why the text was written this way: “The land was at rest for forty years. And the sons of Israel did evil in the sight of the Lord, and the Lord delivered them into the hand of Midian for seven years. And Midian ruled over Israel.” As long as there was justice in the land, therefore, that is, in those who inhabited the land, the land is said to be at rest. But when iniquity arose and “they did evil in the sight of the Lord,” then the Lord is said to have delivered them into the hand of Midian for seven years. Nor are the Midianites said to have ruled over the people of the Lord as long as they observed the commandments of the Lord. But when they began to neglect the divine mandates, the hand of their enemy became stronger and more powerful against them. Yet, whereas their bodily enemies arose and strengthened against them when the first people failed, against us, on the other hand, who are called the spiritual Israel, a spiritual enemy will arise and the hand of demons will be strengthened when we neglect the commandments of God and hold the precepts of Christ in contempt, and we will be delivered to our own enemies when we forsake God’s grace.
[AD 253] Origen of Alexandria on Judges 6:1