'Seventy Years' in the Bible

And it shall come to pass in that day, that Tyre shall be forgotten seventy years, according to the days of one king: after the end of seventy years it shall be unto Tyre as in the song of the harlot.

And it shall come to pass after the end of seventy years, that Jehovah will visit Tyre, and she shall return to her hire, and shall play the harlot with all the kingdoms of the world upon the face of the earth.