2 Chronicles 32:3-4

3he decided, together with his officers and his soldiers, to stop up the water [supply] from the springs which were outside the city [by enclosing them with masonry and concealing them], and they helped him.

4So many people came together, and they stopped up all the springs and the brook which flowed [underground] through the region, saying, “Why should the kings of Assyria come and find an abundance of water?”