2 Chronicles 32:30-31

32:30 Hezekiah dammed up the source of the waters of the Upper Gihon and directed them down to the west side of the City of David. Hezekiah succeeded in all that he did. 32:31 So when the envoys arrived from the Babylonian officials to visit him and inquire about the sign that occurred in the land, God left him alone to test him, in order to know his true motives.