Prisons used for Confining: Enemies Taken Captive
Source: TTT
Judges 16:21
Then the Philistines seized him, gouged out his eyes, and brought him down to Gaza, where he was bound with bronze shackles and forced to grind grain in the prison.
2 Kings 17:4
But the king of Assyria discovered that Hoshea had conspired to send envoys to King So of Egypt, and that he had not paid tribute to the king of Assyria as in previous years. Therefore the king of Assyria arrested Hoshea and put him in prison.
Jeremiah 52:11
Then he put out Zedekiah’s eyes, bound him with bronze shackles, and took him to Babylon, where he kept him in custody until his dying day.