Isaiah 22:11

A ditch between the two walls. The “ditch” here referred to was possibly the tunnel built by Hezekiah to conduct the waters from the old pool at Gihon, a distance of 1,749 ft. (533 m.) southwest, to another pool, or reservoir, known as the Pool of Siloam (see Vol. II, p. 87). Outside an earlier wall, and also outside Hezekiah’s aqueduct and the Pool of Siloam, was a second wall (see on 2 Chron. 32:5). The entire water supply of the Gihon was thus made available to the inhabitants of Jerusalem and denied an enemy without the city. The walls protected the water system. Him that fashioned it. Many in Jerusalem no longer looked to God for protection, but to the works they had themselves devised. They forgot that the Lord was the true builder and maker of the city, and alone able to provide the help needed in time of distress.