2 Chronicles 32:30-32

30 This same Hezekiah also stopped the upper watercourse of Gihon and brought it straight down to the west side of the city of David. And Hezekiah was prospered in all that he did.

31 However, because of the ambassadors of the princes of Babylon, who sent unto him to enquire of the wonder that had happened in the land, God left him, to try him, that he might know all [that was] in his heart.

32 Now the rest of the acts of Hezekiah and his mercy, behold, they [are] written in the vision of Isaiah the prophet, the son of Amoz, [and] in the book of the kings of Judah and Israel.