2 Chronicles 32:1-4

And then, after this exemplary track record, this: Sennacherib king of Assyria came and attacked Judah. He put the fortified cities under siege, determined to take them. When Hezekiah realized that Sennacherib’s strategy was to take Jerusalem, he talked to his advisors and military leaders about eliminating all the water supplies outside the city; they thought it was a good idea. There was a great turnout of people to plug the springs and tear down the aqueduct. They said, “Why should the kings of Assyria march in and be furnished with running water?”