'Seventy Years' in the Bible

And this will happen on that day: And Tyre [will] be forgotten seventy years, like the days of one king. At [the] end of seventy years, it will be for Tyre like the song of the prostitute:

And this shall happen: at [the] end of seventy years, Yahweh will visit Tyre, and she will return to her harlot's wages, and she will commit fornication with all the kingdoms of the world on the face of the earth.