2 Chronicles 32:1-3

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

2And when Hezekiah saw that Sennacherib had come, and that he 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 outside the city: and they helped him.