2 Chronicles 32:29-31

29 Moreover, he made himself cities and possessions of sheep and cows in abundance, for God had given him great substance.

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.