'Tunnel' in the Bible

David said on that day, “Whoever would strike the Jebusites, let him reach the lame and the blind, who are hated by David’s soul, through the water tunnel.” Therefore they say, “The blind or the lame shall not come into the house.”

The rest of the events of Hezekiah’s reign, along with all his might and how he made the pool and the tunnel and brought water into the city, are written in the Historical Record of Judah’s Kings.