2 Chronicles 32:3-5

3 [3-4] he and his officials worked out a plan to cut off the supply of water outside the city, so that the Assyrians would have no water when they came to attack. The officials got together a large work force that stopped up the springs and streams near Jerusalem.

5 Hezekiah also had workers repair the broken sections of the city wall. Then they built defense towers and an outer wall to help protect the one already there. The landfill on the east side of David’s City was also strengthened. He gave orders to make a large supply of weapons and shields,