Isaiah 39:1; Isaiah 39:6

1 At that time Merodach-baladan son of Baladan, king of Babylon, sent letters and a gift to Hezekiah since he heard that he had been sick and had recovered.
6 'The time will certainly come when everything in your palace and all that your fathers have stored up until this day will be carried off to Babylon; nothing will be left,' says the Lord.