Charles Ellicott Commentary Lamentations 3:55

"I called upon thy name, O Jehovah, out of the lowest dungeon." — Lamentations 3:55 (ASV)

Out of the low dungeon. —Here, again, we have to choose between a literal reference to Jeremiah’s sufferings or a figurative interpretation. The phrase is the same as that of Psalms 88:6.