Isaiah 23:15 in the World English Bible
It will come to pass in that day that Tyre will be forgotten seventy years, according to the days of one king. After the end of seventy years it will be to Tyre like in the song of the prostitute.
Context
14 Howl, ye ships of Tarshish: for your strength is laid waste.
15 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 shall Tyre sing as an harlot.
16 Take an harp, go about the city, thou harlot that hast been forgotten; make sweet melody, sing many songs, that thou mayest be remembered.