A moment of profound dual crisis strikes the king of Judah, merging national turmoil with personal tragedy. The king finds himself facing a terrifying external enemy and a life-threatening illness at the exact same time. This event takes place during the looming threat of Sennacherib, king of Assyria. While some suggest that the illness actually occurred after Assyria's defeat to maintain a chronological sequence of events [שד״ל ואברבנאל בשם רלב״ג], the primary approach among commentators is that the events happened simultaneously, doubling the king's distress. According to tradition, Hezekiah fell ill three days before the miraculous defeat of Sennacherib's camp. The peak of his illness and his visit to the Temple coincided perfectly with the day of the defeat and the first day of Passover [רש״י, מצודת דוד, מלבי״ם, אברבנאל].
The illness that strikes Hezekiah is fatal and dangerous, offering no path to natural recovery [מצודת דוד, שד״ל]. Though some suggest he caught a plague spreading through the Assyrian camp, this idea is rejected because there is no record of a mass plague among the people of Judah [שד״ל]. In truth, the illness is not natural at all. It is a direct punishment from God. Hezekiah had avoided marriage and children because he foresaw that he would produce a wicked son. God rejected this decision, as it improperly interfered with hidden divine matters and threatened the continuation of the Davidic line [אברבנאל].
The prophet Isaiah arrives with harsh news, instructing the king to prepare his will and settle his family affairs before his death [מצודת דוד, ביאור שטיינזלץ]. However, this instruction carries a sharp sting. Because Hezekiah refused to start a family, he has no true heir to command, leaving him only his servants and property to manage. This divine message is not simply a practical step. It is designed to shock the king, awaken him to repentance and prayer, and lead him to fix his spiritual flaw. Only by defeating his internal enemy can he overcome both his physical illness and the external military threat [מלבי״ם, אברבנאל]. Isaiah stresses the absolute severity of the decree, making it clear that the king will not recover from this danger [שד״ל, ביאור שטיינזלץ]. The prophet's repetitive warning that he will die and not live contains a deep spiritual threat. It means he will die in this world and not live in the World to Come, serving as the ultimate punishment for his refusal to fulfill the Commandment to have children [רש״י, אברבנאל].