'Millstone' in the Bible

Then a single powerful angel picked up a boulder like a great millstone and flung it into the sea, saying, “With such violence will Babylon the great city be hurled down [by the sudden, spectacular judgment of God], and will never again be found.

And the sound of harpists and musicians and flutists and trumpeters will never again be heard in you, and no skilled artisan of any craft will ever again be found in you, and the sound of the millstone [grinding grain] will never again be heard in you [for commerce will no longer flourish, and normal life will cease].