Isa 38:1-22. Hezekiah’s sickness; perhaps connected with the plague or blast whereby the Assyrian army had been destroyed.
Set ... house in order - Make arrangement as to the succession to the throne; for he had then no son; and as to thy other concerns.
thou shall die - speaking according to the ordinary course of the disease. His being spared fifteen years was not a change in God’s mind, but an illustration of God’s dealings being unchangeably regulated by the state of man in relation to Him.