'Forty Years' in the Bible

And the land had rest forty years. And Othniel the son of Kenaz died.

So let all thine enemies perish, O Jehovah: But let them that love him be as the sun when he goeth forth in his might. And the land had rest forty years.

So Midian was subdued before the children of Israel, and they lifted up their heads no more. And the land had rest forty years in the days of Gideon.

And the children of Israel again did that which was evil in the sight of Jehovah; and Jehovah delivered them into the hand of the Philistines forty years.