2 Chronicles 20:3

Jehoshaphat feared Partly from human frailty, and partly from the remembrance of his own guilt, and the wrath of God denounced against him for it, 2 Chronicles 19:2. And set himself to seek the Lord The phrase denotes his settled resolution, seriousness, and earnestness in it, and the preparing and fixing of his heart for it. And proclaimed a fast Partly in token of his humiliation and penitence for his sins, and partly to render himself and his people more fervent in their prayers.