'Forty Years' in the Bible

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

So, perish all thine enemies, O Yahweh, But be, they who love him, as the going forth of the sun, in his might! And the land had rest forty years.

Thus was Midian subdued, before the sons of Israel, neither did they again lift up their head, - and the land had rest forty years, in the days of Gideon.

And the sons of Israel again did the thing that was wicked in the sight of Yahweh, - so Yahweh delivered them up into the hand of the Philistines, forty years.