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.
References for Isaiah 39:1
Hezekiah was pleased with them, and showed them his treasure house-the silver, the gold, the spices, and the precious oil-and all his armory, and everything that was found in his treasuries. There was nothing in his palace and in all his realm that Hezekiah did not show them.
Then Isaiah the prophet came to King Hezekiah and asked him, "What did these men say? The men who came to you-where were they from?" Hezekiah replied, "They came to me from a distant country, from Babylon."
And he asked, "What have they seen in your palace?" Hezekiah answered, "They have seen everything in my palace. There isn't anything in my storehouses that I didn't show them."
Then Isaiah said to Hezekiah, "Hear the word of the Lord of Hosts:
'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.