He appointed judges in the land in all the fortified cities of Judah, city by city,
Jehoshaphat, having done what he could to make his people good, is here providing, if possible, to keep them so by the influence of a settled magistracy. He had sent preachers among them, to instruct them (Ch2 17:7-9), and that provision did well; but now he saw it further requisite to send judges among them, to see the laws put in execution, and to be a terror to evil-doers.
Commenting on 2 Chronicles 19:5-11
And he set judges in the land throughout all the fenced cities of Judah, city by city,.... Inferior judges in lesser courts of judicature than that at Jerusalem, and that in every city, that judgment and justice might be executed everywhere; such were appointed by David, but had been neglected, and now restored, see Ch1 26:29. .
HIS INSTRUCTIONS TO THE JUDGES. (Ch2 19:5-7) he set judges in the land--There had been judicial courts established at an early period. But Jehoshaphat was the first king who modified these institutions according to the circumstances of the now fragmentary kingdom of Judah. He fixed local courts in each of the fortified cities, these being the provincial capitals of every district (see on Deu 16:18).