II Chronicles Chapter 32

32:2-4
And when Hezekiah saw that Sennacherib was come, and that he was purposed to fight against Jerusalem,
He 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.
So there was gathered much people together, who stopped all the fountains, and the brook that ran through the midst of the land, saying, Why should the kings of Assyria come, and find much water?

32:6-8
And he set captains of war over the people, and gathered them together to him in the street of the gate of the city, and spake comfortably to them, saying,
Be strong and courageous, be not afraid nor dismayed for the king of Assyria, nor for all the multitude that is with him: for there be more with us than with him:
With him is an arm of flesh; but with us is the Lord our God to help us, and to fight our battles. And the people rested themselves upon the words of Hezekiah king of Judah.

32:21
And the Lord sent an angel, which cut off all the mighty men of valour, and the leaders and captains in the camp of the king of Assyria. So he returned with shame of face to his own land. And when he was come into the house of his god, that they came forth of his own bowels slew him there with the sword.

32:30-31
This same Hezekiah also stopped the upper watercourse of Gihon, and brought it straight down to the west side of the city of David. And Hezekiah prospered in all his works.
Howbeit in the business of the ambassadors of the princes of Babylon, who sent unto him to inquire of the wonder that was done in the land, God left him, to try him, that he might know all that was in his heart.