2 Chronicles 32:3,4

To stop the waters of the fountains To fill them up with earth and other things cast into them, that it might not be known there was any water there, and withal to draw the waters by secret passages and pipes to Jerusalem. And the brook that ran through the midst of the land The brook Kidron, which being but small, except when much rain fell, they easily filled up the spring of it. Saying, Why should the kings of Assyria find much water Which was scarce in that country, and the want of it might greatly distress the Assyrian army.