Hammelech

Then the king ordered Yerachme'el the king's son, S'rayahu the son of 'Azri'el and Shelemyahu the son of 'Avde'el to arrest Barukh the scribe and Yirmeyahu the prophet; but ADONAI hid them.

Then they took Yirmeyahu and threw him into the cistern of Malkiyahu the king's son, which was in the guards' quarters; they let down Yirmeyahu into it with ropes. In the pit there was no water, but there was mud; and Yirmeyahu sank into the mud.