2 Chronicles 32:30-32

30 It was this same Hizkiyahu who blocked the upper outlet of the Gichon Spring and diverted the water straight down on the west side of the City of David. Hizkiyahu succeeded in all that he did.

31 However, in the matter of the ambassadors from the princes of Bavel, who sent to him to learn of the marvel that had taken place in the land, God left him by himself, in order to test him, so that he might know everything that was in his heart.

32 Other activities of Hizkiyahu and his good deeds are recorded in the vision of Yesha‘yahu the prophet, the son of Amotz, and in the Annals of the Kings of Y’hudah and Isra’el.