2 Chronicles 32:1-3

1After these things and this faithfulness, Sennacherib king of Assyria came and entered into Judah, and encamped against the fortified cities, and thought to break into them.

2And when Hezekiah saw that Sennacherib was come, and that he was minded to fight against Jerusalem,

3he took counsel with his princes and his mighty men to stop the fountains of waters that were outside the city; and they helped him.