Jeremiah 38:6 (KJV)

Therefore the princes said unto the king, We beseech thee, let this man be put to death: for thus he weakeneth the hands of the men of war that remain in this city, and the hands of all the people, in speaking such words unto them: for this man seeketh not the welfare of this people, but the hurt.

Then Zedekiah the king said, Behold, he is in your hand: for the king is not he that can do any thing against you.

Then took they Jeremiah, and cast him into the dungeon of Malchiah the son of Hammelech, that was in the court of the prison: and they let down Jeremiah with cords. And in the dungeon there was no water, but mire: so Jeremiah sunk in the mire.

Now when Ebed–melech the Ethiopian, one of the eunuchs which was in the king’s house, heard that they had put Jeremiah in the dungeon; the king then sitting in the gate of Benjamin;

Ebed–melech went forth out of the king’s house, and spake to the king, saying,