2 Chronicles 32:30-31

30It was Hezekiah who blocked the upper outlet of the Spring of Gihon and channeled it down to the west side of the City of David. And Hezekiah prospered in all that he did. 31And so when ambassadors of the rulers of Babylon were sent to him to inquire about the wonder that had happened in the land, God left him alone to test him, that He might know all that was in Hezekiah’s heart.