What Is Cistern in the Bible?
Object
A pit dug to collect rainwater. When it was dry, it was sometimes used as a prison.
Where it appears in the Bible
Genesis 37:24; Jeremiah 38:6
What the Bible says
Genesis 37:24
And cast him into an old pit, where there was no water.
Jeremiah 38:6
Then they took Jeremias and cast him into the dungeon of Melchias the son of Amelech, which was in the entry of the prison: and they let down Jeremias by ropes into the dungeon, wherein there was no water, but mire. And Jeremias sunk into the mire.
Douay-Rheims Bible (Challoner revision), public domain.
Source: RAE, “cisterna”