2 Chronicles 32:1-3

1After these things, and the establishment thereof, Sennacherib king of Assyria came, and entered into Judah, and encamped against the fenced cities, and thought to win them for himself.1

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

3He took counsel with his princes and his mighty men to stop the waters of the fountains which were without the city: and they did help him.