Isaiah 39:1

In the parable of the rich man, he flattered himself about the increase of his fields. But God said to him, "Fool! This night your soul is required of you; and the things you have prepared, whose will they be?" It was the same way when King Hezekiah heard from Isaiah the sad doom of his kingdom after he had gloried before the envoys of Babylon in his treasures and the deposits of his precious things.

You juxtaposed [events] so that you might not grieve us and that you might save them. Those who had seized our silver brought gold. Those who had wounded our bodies brought myrrh. Those who had burned our sanctuary offered frankincense to your divinity.The myrrh [of the Magi] intercedes for their swords with which they killed us. Their gold intercedes for our treasures, for they plundered the treasuries of the house of Hezekiah. Their frankincense appeases your divinity, for they had angered your Father.… The Babylonians, too, came up [and] afflicted the children in Judah. By you the children have found peace, for by you the vicious have become worshipers. Those who despised old men honor a Child who is older than all. Babylon, too, sent offerings to Hezekiah; the envoys who saw his treasures were amazed. What did you show to the Magi? You showed a wonder, for they rendered you homage although you were poor. However great was the ivory palace of the kings of our people, greater and more beautiful is the little cave in which I bore you.

Now, when the Babylonians heard about Hezekiah's healing from the sickness, they sent ambassadors to him, and not without reason. Indeed, on the day when the sun went backward, one extra hour was added to the duration of the day, which did not elude the Babylonians, who were skilled in their observation of the stars. And as they venerated the sun as divine, they perceived that it was turned back by a superior power. Therefore they were eager to investigate the cause of the phenomenon. Thus driven by curiosity, they learned that the God of the Hebrew people was great and that he was the Creator of the world. When Hezekiah was healed, through which also the miracle of the sun took place, they perceived what happened and strongly desired the friendship of Hezekiah as a man loved by God. That is the story of the Jewish teacher.However, I grasped that all of the following events happened the same year: the attack of the Assyrians against the Jewish people, the defeat of the Assyrians by the angel of God, Sennacherib's escape, the revolt of his subjects and the death of the son who succeeded him, which is not mentioned in this text. It is likely that the rumor about all those events reached the Babylonian king, who showed friendship toward Hezekiah and sent him gifts, an ambassador and letters.