2 Chronicles 32:2-5

Hezekiah knew that Sennacherib had come to Jerusalem to attack it. So Hezekiah and his officers and army commanders decided to cut off the water from the springs outside the city. So the officers and commanders helped Hezekiah. Many people came and cut off all the springs and the stream that flowed through the land. They said, “The king of Assyria will not find much water when he comes here.” Then Hezekiah made Jerusalem stronger. He rebuilt all the broken parts of the wall and put towers on it. He also built another wall outside the first one and strengthened the area that was filled in on the east side of the old part of Jerusalem. He also made many weapons and shields.