'Cistern' in the Bible

He said, "Capture them alive!" So they captured them alive and then executed all forty-two of them in the cistern at Beth Eked. He left no survivors.

Don't listen to Hezekiah!' For this is what the king of Assyria says, 'Send me a token of your submission and surrender to me. Then each of you may eat from his own vine and fig tree and drink water from his own cistern,