Jeremiah 38:6

Then took they Jeremiah— It is commonly thought that Jeremiah, during his abode in this loathsome place, composed the melancholy meditations inserted in the third chapter of his Lamentations. See Lamentations 3:53; Lamentations 3:55. Josephus asserts, that he sunk up to his neck in the mire; and adds, that their intention in putting him into so noisome a place was, that he might perish in it. See Antiq. lib. 9: cap. 10 and Calmet. This account of the dungeon accords with what was mentioned in the note on ch. Jeremiah 37:16. For if the dungeon was in the open court, and left open like a well at top, there being no other way of giving it air and light, the falling of rain mixing with the earth below would occasion mud in a place where the sun's rays could not reach to dry up the moisture.