Judges 6:1-6

Then the Israelites did evil in the sight of the LORD; and the LORD gave them into the hand of Midian for seven years. The [powerful] hand of Midian prevailed against Israel. Because of Midian the sons of Israel made for themselves the dens (hideouts) which were in the mountains, and the caves and the [mountain] strongholds. For it was whenever Israel had sown [their seed] that the Midianites would come up with the Amalekites and the people of the east and go up against them. So they would camp against them and destroy the crops of the land as far as Gaza, and leave no sustenance in Israel as well as no sheep, ox, or donkey. For they would come up with their livestock and their tents, and they would come in as numerous as locusts; both they and their camels were innumerable. So they came into the land to devastate it. So Israel was greatly impoverished because of the Midianites, and the Israelites cried out to the LORD [for help].