II Chronicles 32:4, 30, 32

Thus many people gathered together who stopped all the springs and the brook that ran through the land, saying, “Why should the kings of Assyria come and find much water?”

This same Hezekiah also stopped the water outlet of Upper Gihon, and brought the water by tunnel to the west side of the City of David. Hezekiah prospered in all his works.

Now the rest of the acts of Hezekiah, and his goodness, indeed they are written in the vision of Isaiah the prophet, the son of Amoz, and in the book of the kings of Judah and Israel.