וְעַ֖ל כָּל־אֳנִיּ֣וֹת תַּרְשִׁ֑ישׁ וְעַ֖ל כָּל־שְׂכִיּ֥וֹת הַחֶמְדָּֽה׃
Rashi on Isaiah
And over all the ships Jonathan renders: And over all those who inhabit the islands of the sea, who go and come by ship.
Ibn Ezra on Isaiah
Ships of Tarshish. If taken figuratively, they signify the merchants; literally, they are ships which belong to Israelites, and are going to Tarshish.