'Cistern' in the Bible

Then he said, "Seize them alive!" So they seized them alive but then slaughtered them at the cistern of Beth-Eked, forty-two men. He did not allow any of them to survive.

Do not listen to Hezekiah; for thus says the king of Assyria, 'Make with me a treaty of peace and come out to me that each [may] eat [from] his vine and each [from] his fig tree, and each [may] drink water [from] his cistern!