Charles Ellicott Commentary Isaiah 47:11

"Therefore shall evil come upon thee; thou shalt not know the dawning thereof: and mischief shall fall upon thee; thou shalt not be able to put it away: and desolation shall come upon thee suddenly, which thou knowest not." — Isaiah 47:11 (ASV)

Thou shalt not be able to put it off ... —The words have been variously rendered: (1) of which you shall know no dawn, i.e., after the night of calamity; and (2) which you shall not be able to charm away. Stress is laid on the destruction being at once unforeseen and irretrievable.