במדבר כד:כד פירוש: רש״י, רשב״ם, טור הארוך ורבנו בחיי

צים מיד כתים SHIPS FROM THE LAND OF CHITTIM and the people of Chittim — these are the Romans — will pass over in big ships against Assyria.

וצים, as in Isaiah 33,21 וצי אדיר, where not even a mighty vessel can keep afloat.

וצים מיד כתים, “and Tzim from Kittim;” a reference to the Romans.”