2 Chronicles 32:30-31

30It was also Hezekiah who stopped the upper spring of the waters of Gihon and channeled them downward to the west side of the city of David. Hezekiah succeeded in all that he did.

31But when the ambassadors of the princes of Babylon were sent to him to inquire about the wonder that had happened in the land, God left him alone to test him, to know all that was in his heart.