Jerome : (Verse 11.) He stretched out his hand over the sea, he troubled the kingdoms. Who stretched out his hand? Without a doubt, based on the context of the words themselves, it is God, about whom he said above: the Lord of hosts has planned this, to take away the pride of all glory. He therefore stretched out his hand over all the seas, signifying the world and its inhabitants, and troubled all the nations, among which, even you, Tyre, were troubled, whether it be over the sea, on which you are specifically situated. — Commentary on Isaiah