John Calvin on Isaiah 23:10

10. For there is not any longer a girdle. {Bogus footnote} מזח (mēzăch) is translated by some a girdle, and by others strength. Those who translate it girdle, suppose the meaning to be that Tyre will be so completely plundered, that she will not even have a girdle left; and that the allusion is to the vast wealth laid out in merchandise, for the poorest of the merchants sell girdles. But I think that Isaiah alludes to the situation of the city, which was protected on all sides by ditches, mounds, ramparts, and the sea.