Even if you were to crush the foolish with a mortar, as when a pestle strikes over pearled barley, his foolishness would not be taken from him
Other versions
King James Version
Though thou shouldest bray a fool in a mortar among wheat with a pestle, yet will not his foolishness depart from him.English Standard Version
Crush a fool in a mortar with a pestle along with crushed grain, yet his folly will not depart from him.New International Version
Though you grind a fool in a mortar, grinding him like grain with a pestle, you will not remove his folly from him.