Isaiah 39:1

Now in the fourteenth year of King Hezekiah, Sennacherib king of Assyria came up against all the fortified cities of Judah and seized them.

At that time Berodach-baladan a son of Baladan, king of Babylon, sent letters and a present to Hezekiah, for he heard that Hezekiah had been sick.

Even in the matter of the envoys of the rulers of Babylon, who sent to him to inquire of the miraculous sign that had happened in the land, God left him alone only to test him, that He might know all that was in his heart.

At that time Merodach-baladan son of Baladan, king of Babylon, sent letters and a present to Hezekiah, for he heard that he had been sick and was growing stronger.

Hezekiah Shows His Treasures to Babylon