Isn’t everything else about Hezekiah, all his heroic acts and how he made the pool and tunnel to bring water into the city, written in the official records of the kings of Judah?
Hezekiah was the one who stopped the water from flowing from the upper outlet of Gihon. He channeled the water directly underground to the west side of the City of David. Hezekiah succeeded in everything he did.
A large crowd gathered as they stopped all the springs and the brook that flowed through the land. They said, “Why should the kings of Assyria find plenty of water?”