Proverbs 20:26 - Joseph Benson’s Commentary on the Old and New Testaments

A wise king Who seriously minds his duty, and his true interest; scattereth the wicked Breaks their companies and confederacies, and forces them to flee several ways for their own safety; or drives them from his presence, and from the society of good men, as the chaff is separated from the corn, by the husbandmen, and driven away by the wind; as the word מזרה, here used, commonly signifies; and to which the next clause hath some reference. And bringeth the wheel over them Punishes them as their offences deserve, alluding to the cart-wheel, which was anciently turned over the sheaves, to beat the corn out of them. In other words, expressive of the plain meaning, “A good king separates the bad from the good, by a due execution of his laws; which is like winnowing the corn, after the chaff is separated from it, by drawing the wheel over it.”