2 Chronicles 32:30, commentary and pictures

Hezekiah secured Jerusalem's water supply by stopping the upper watercourse of Gihon and bringing it straight down to the west side of the city of David. The Pool of Hezekiah, near the present Jaffa Gate on Jerusalem's west side, remains as a surviving feature associated with that work. The act belongs to the reign of Hezekiah, counted among the good kings. He began his reign with political and religious reform, broke Judah's submission to Assyria, and saw Jerusalem delivered from the Assyrian army after he and the people humbled themselves and prayed.

Hezekiah prospered in all his works because he did his duty. His example shows that doing duty brings blessing, and that God helps His people with blessing when they seek Him wholeheartedly. That prosperity was followed by a time when Hezekiah turned away from God. The consequences of that turning came upon the people about a hundred years later.

His experience stands as an admonition about prayer. He asked God to yield to his own will and persisted until his petition was granted. That course stands in contrast to prayer offered in submission to God's will.