Isaiah 39:1-8

At that time Merodachbaladan, the son of Baladan, king of Babylon, sent letters and a present to Hezekiah: for he heard that he had been sick, and that he had recovered (Isaiah 39:1).

Now here's another bad thing that came out of his recovery. The king of Babylon sent his son with a message of, "Glad you're well and all."

Hezekiah was glad of them, and showed them the house of his precious things, the silver, and the gold, and the spices, and the precious ointment, and all the house of his armor, and all of his treasures: there was nothing in his house, nor in all his dominion, that Hezekiah did not show them. Then came Isaiah the prophet to king Hezekiah, and said unto him, What did these men say to you? and where did they come from? And Hezekiah said, They are come from a far country unto me, even from Babylon. And Isaiah said, What did they see in your house? And Hezekiah answered, All that I have in my house they have seen: there is nothing among my treasures that I did not show them. Then said Isaiah to Hezekiah, Hear the word of the LORD of hosts: Behold, the days come, that all that is in your house, and that which your fathers have laid up in store until this day, shall be carried to Babylon: and nothing shall be left, saith the LORD. And of thy sons that shall issue from thee, which thou shalt beget, shall they take away; and they shall be eunuchs in the palace of the king of Babylon. Then said Hezekiah to Isaiah, Good is the word of the LORD which you have spoken. He said moreover, For there shall be peace and truth in my days (Isaiah 39:2-8).

So it would appear that God's time for Hezekiah had come and that nothing but evil came out of the prolonging of his years fifteen years. When God's time comes to go, man, let's go.
Now this is the end of what they call Part One of the book of Isaiah. Thirty-nine Chapter s comprise the first part, which are, more or less, equivalent to the thirty-nine Chapter s of, or thirty-nine books of the Old Testament. Now the next twenty-seven Chapter s come into a whole new theme. It's a whole...in fact, it is so different that it has caused some critics to say that they are actually two Isaiah's and that another Isaiah wrote this second part because it is so different in style and all than the first part of Isaiah. "