Isaiah 23: 14-18. Howl, ye ships of Tarshish: for your strength is laid waste. 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. Take an harp, go about the city, thou harlot that hast been forgotten; make sweet melody, sing many songs, that thou mayest be remembered. And it shall come to pass after the end of seventy years, that the Lord will visit Tyre, and she shall turn by her hire, and shall commit fornication with all the kingdoms of the world upon the face of the earth. And her merchandise and her hire shall be holiness to the Lord: it shall not be treasured nor laid up; for her merchandise shall be for them that dwell before the Lord, to eat sufficiently, and for durable clothing.
The strength of Tarshish was greatly diminished by the fall of Tyre. Tyre would be forgotten, her importance lost, her trade destroyed.
The seventy years in verse 15 refers to the years Judah would be in captivity. Nebuchadnezzar began his siege of Tyre in the first year of his reign and from then to the taking of Babylon by Darius and Cyrus was 70 years. At that time, the harlots which had been taken captive to Babylon were to be released. Jeremiah spoke of all these nations serving the king of Babylon. Some were conquered sooner than others, but all were to be set free at the end of the 70 years which were to be during the life of “him” (Nebuchadnezzar) and his son (Evil-Merodach), and his son’s son (Belshazzar).
The Lord would permit Tyre to be restored after 70 years, and she would enjoy all her riches and glory as before. She would be made rich again by her resumed trade. Tyre was rebuilt on the Island and soon rivaled the former Tyre in glory and wealth. The new city was taken by Alexander the Great about 255 years after the former city had been razed by Nebuchadnezzar.
In verse 18, most Bible scholars believe that Tyre will be restored during the Millenium, and her trade shall be “holiness to the Lord,” and her wealth would not be hoarded to make men rich at the expense of the poor, but will be used for them that dwell before the Lord, so that they can have sufficient food and clothing. Because this has never yet been fulfilled, it must refer to the Millenium when there shall be HOLINESS UNTO THE LORD upon the bells of the horses and upon every pot and pan in Jerusalem (Zech. 14:1-5, 9 16-21).