2 Chronicles 32:1-3

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

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

3 he 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.