'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. At the end of seventy years it shall be for Tyre as the harlot's song.

And it shall come to pass at the end of seventy years, that Jehovah will visit Tyre; and she will return to her hire, and will commit fornication with all the kingdoms of the earth upon the face of the ground.