'Generations' in the Bible

So all the generations from Abraham to David are fourteen generations; and from David until the carrying away into Babylon are fourteen generations; and from the carrying away into Babylon unto Christ are fourteen generations.

For he hath regarded the low estate of his handmaiden: for, behold, from henceforth all generations shall call me blessed.

Even the mystery which hath been hid from ages and from generations, but now is made manifest to his saints: